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  • Inorganic Chemistry  (8,006)
  • Lunar and Planetary Science and Exploration  (1,581)
  • Cell & Developmental Biology
  • Seismology
  • Weizen
  • 2015-2019  (2,168)
  • 1930-1934
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  • 1
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    The AlpArray Seismic Network: A Large-Scale European Experiment to Image the Alpine Orogen (2019)
    Details
    Publication Date: 2019-12-05
    Description: The AlpArray programme is a multinational, European consortium to advance our understanding of orogenesis and its relationship to mantle dynamics, plate reorganizations, surface processes and seismic hazard in the Alps–Apennines–Carpathians–Dinarides orogenic system. The AlpArray Seismic Network has been deployed with contributions from 36 institutions from 11 countries to map physical properties of the lithosphere and asthenosphere in 3D and thus to obtain new, high-resolution geophysical images of structures from the surface down to the base of the mantle transition zone. With over 600 broadband stations operated for 2 years, this seismic experiment is one of the largest simultaneously operated seismological networks in the academic domain, employing hexagonal coverage with station spacing at less than 52 km. This dense and regularly spaced experiment is made possible by the coordinated coeval deployment of temporary stations from numerous national pools, including ocean-bottom seismometers, which were funded by different national agencies. They combine with permanent networks, which also required the cooperation of many different operators. Together these stations ultimately fill coverage gaps. Following a short overview of previous large-scale seismological experiments in the Alpine region, we here present the goals, construction, deployment, characteristics and data management of the AlpArray Seismic Network, which will provide data that is expected to be unprecedented in quality to image the complex Alpine mountains at depth.
    Description: Published
    Description: 1009–1033
    Description: 1T. Struttura della Terra
    Description: JCR Journal
    Keywords: Seismology ; Alps ; Seismic network ; Geodynamics ; Seismic imaging ; Mountain building
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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    PAPER (OA)
  • 2
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    Journal of Geophysics - Zeitschrift für Geophysik 60 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:60
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 26 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1986.
    Description: Inhaltsverzeichnis: Journal of Geophysics 60 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0011.pdf"〉Investigation of the velocity- and Q-structure of the lowermost mantle using 〈i〉PcP〈/i〉/〈i〉P〈/i〉 amplitude ratios from arrays at distances of 70°–84°〈/a〉〈br〉 (Schlittenhardt, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0014.pdf"〉Fast plane-wave and single-shot migration by Fourier transform〈/a〉〈br〉 (Temme, P., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0015.pdf"〉A method of calculating lithosphere thickness from observations of deglacial land uplift and tilt〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0016.pdf"〉Volcanoes, fountains, earthquakes, and continental motion – What causes them? 〈/a〉〈br〉 (Kundt, W., Jessner, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0017.pdf"〉Magnetic properties and oxidation experiments with synthetic olivines〈/a〉〈br〉 (Fe〈sub〉χ〈/sub〉Mg〈sub〉1–χ〈/sub〉)〈sub〉2〈/sub〉SiO〈sub〉4〈/sub〉, 0≦χ≦1 (Hoffmann, V., Soffel, H.C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0018.pdf"〉Magnetic mineralogy of basalts from El-Bahnasa and Tahna, Egypt〈/a〉〈br〉 (Wassif, N.A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0020.pdf"〉On the use of line current analogues in geomagnetic depth sounding〈/a〉〈br〉 (Jones, A.G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0021.pdf"〉Observations of the VLF quiet band phenomenon〈/a〉〈br〉 (Matthews, J.P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0022.pdf"〉In memoriam Gustav Adolf Schulze (1911–1986)〈/a〉〈br〉 (Dürschner, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0023.pdf"〉Book reviews〈/a〉〈br〉 (Berckhemer, H., Dieminger, W., Engelhard, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0024.pdf"〉Hydromagnetic waves at low latitudes: a symposium review from the fifth IAGA assembly〈/a〉〈br〉 (Fraser, B.J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0025.pdf"〉Generation and propagation mechanisms of low-latitude magnetic pulsations – A review〈/a〉〈br〉 (Yumoto, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0026.pdf"〉Experimental aspects of low-latitude pulsations - A review〈/a〉〈br〉 (Verö, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0027.pdf"〉GRF broad-band array analysis of the 1982 Miramichi, New Brunswick earthquake sequence〈/a〉〈br〉 (Basham, P.W., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0028.pdf"〉Rockmagnetism and palaeomagnetism of an early Cretaceous/Late Jurassic dike swarm in Rio Grande do Norte, Brazil〈/a〉〈br〉 (Bücker, C., Schult, A., Bloch, W., Guerreiro, S.D.C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0029.pdf"〉Second Conference on Scientific Ocean Drilling〈/a〉〈br〉 (COSOD II)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0030.pdf"〉Book reviews〈/a〉〈br〉 (Jentzsch, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0031.pdf"〉Deep-seated lateral velocity variations beneath the GRF array inferred from mislocation patterns and P residuals〈/a〉〈br〉 (Faber, S., Plomerová, J., Babuška, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0034.pdf"〉Lateral variations of the structure of the crust-mantle boundary from conversions of teleseismic 〈i〉P〈/i〉 waves〈/a〉〈br〉 (Qiyuan, L., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0035.pdf"〉Cross spectral analysis of Swabian Jura (SW Germany) three-component microearthquake recordings〈/a〉〈br〉 (Scherbaum, F., Wendler, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0036.pdf"〉The retrieval of the seismic moment tensor from first-order perturbation theory and generation of compatible models〈/a〉〈br〉 (Lana, X., Correig, A.M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0037.pdf"〉Impulsive processes in the magnetotail during substorm expansion〈/a〉〈br〉 (Sergeev, V.A., Bösinger, T., Lui, A.T.Y)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0038.pdf"〉Spatial and temporal characteristics of impulsive structure of magnetospheric substorm〈/a〉〈br〉 (Sergeev, V.A., Pellinen, R.J., Bösinger, T., Baumjohann, W., Stauning, P., Lui, A.T.Y.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0039.pdf"〉Seismic signal velocity in absorbing media〈/a〉〈br〉 (Schmidt, T., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0040.pdf"〉In memoriam Nachruf Professor Ludwig Biermann〈/a〉〈br〉 (Treffitz, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0060/LOG_0041.pdf"〉Book Reviews〈/a〉〈br〉 (Korn, M.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Earthquakes ; Earth's Mantle ; Geomagnetic Pulsations ; Germany ; Inverse Problems ; Magnetosphere ; Rock Magnetism ; Seismology ; Seismograms ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 3
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 49 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:49
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält Artikel zu 41 Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1981.
    Description: Inhaltsverzeichnis: Journal of Geophysics 49 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0011.pdf"〉Palaeomagnetism of a Jurassic Ophiolite Series in East Elba (Italy) 〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0013.pdf"〉Paleomagnetic Evidence from Mesozoic Carbonate Rocks for the Rotation of Sardinia〈/a〉〈br〉 (Horner, F., Lowrie, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0015.pdf"〉A Geotectonic Paradox: Has the Earth Expanded? 〈/a〉〈br〉 (Schmidt, P. W., Embleton, B. J. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0016.pdf"〉Application of Magnetotelluric and DC Electrical Resistivity Methods in the Neapolitan Geothermal Area〈/a〉〈br〉 (Hunsche, U., Rapolla, A., Musmann, G., Alfano, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0018.pdf"〉Velocity Variations in Systems of Anisotropic Symmetry〈/a〉〈br〉 (Crampin, S., Kirkwood, S. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0019.pdf"〉Shear-Wave Singularities of Wave Propagation in Anisotropic Media〈/a〉〈br〉 (Crampin, S., Yedlin, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0020.pdf"〉Temperature Derivatives of Compressional and Shear Wave Velocities in Crustal and Mantle Rocks at 6 kbar Confining Pressure〈/a〉〈br〉 (Kern, H., Richter, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0021.pdf"〉A Crustal Gravity Model of the Mare Serenitatis - Mare Crisium Area of the Moon〈/a〉〈br〉 (Janle, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0022.pdf"〉On the Origin of the Annual Wave in Hemispheric Geomagnetic Activity〈/a〉〈br〉 (Meyer, J., Damaske, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0023.pdf"〉On the Relation Between Magnetic Field-Aligned Electrostatic Electron Acceleration and the Resulting Auroral Energy Flux〈/a〉〈br〉 (Wilhelm, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0024.pdf"〉Application of Different Methods for the Determination of Ionospheric Conductivities from Sounding Rocket Observations〈/a〉〈br〉 (Brüning, K., Baumjohann, W., Wilhelm, K., Stüdemann, W., Urban, A., Ott, W., Spenner, K., Schmidtke, G. L., Fischer, H. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0025.pdf"〉Numerical Experiments on Convection in a Chemically Layered Mantle〈/a〉〈br〉 (Christensen, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0026.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Raikes, S. A., Engelhard, L., Pape, H., Theile, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0028.pdf"〉Steady State Creep of Fine Grain Granite at Partial Melting〈/a〉〈br〉 (Auer, F., Berckhemer, H., Oehlschlegel, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0029.pdf"〉Laboratory Synthesis of Aluminium-Substituted Titanomaghemites and Their Characteristic Properties〈/a〉〈br〉 (Özdemir, Ö, O’Reilly, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0030.pdf"〉Densities and Magnetic Susceptibilities of Precambrian Rocks of Different Metamorphic Grade〈/a〉〈br〉 (Southern Indian Shield) (Subrahmanyam, C., Verma, R. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0031.pdf"〉Lithospheric Structure and Teleseismic 〈i〉P〈/i〉-Wave Reflection Delays Under Fennoscandia and Siberia〈/a〉〈br〉 (Stewart, Ian C. F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0033.pdf"〉Propagation of Surface Waves in Marine Sediments〈/a〉〈br〉 (Essen, H.-H., Janle, H., Schirmer, F., Siebert, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0035.pdf"〉Simultaneous Observation of an Intense 65 keV Field-Aligned Proton Beam and ULF-waves During a Break-up Event〈/a〉〈br〉 (Stüdemann, W., Goertz, C. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0036.pdf"〉Observations of Field-Aligned Current Sheets Above Discrete Auroral Arcs〈/a〉〈br〉 (Wilhelm, K., Klöcker, N., Theile, B., Ott, W., Spenner, K., Grabowski, R., Wolf, H., Stüdemann, W., Dehmel, G., Fischer, H. M., Schmidtke, G. L., Baumjohann, W., Riedler, W., Urban, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0038.pdf"〉Multi-Method Observations and Modelling of the Three-Dimensional Currents Associated with a Very Strong Ps6 Event〈/a〉〈br〉 (Gustafsson, G., Baumjohann, W., Iversen, I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0040.pdf"〉Variability of Solar EUV Fluxes and Exospheric Temperatures〈/a〉〈br〉 (Schmidtke, G., Börsken, N., Sünder, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0041.pdf"〉Paleomagnetism of Quaternary and Miocene Lavas from North-East and Central Morocco〈/a〉〈br〉 (Najid, D., Westphal, M., Hernandez, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0042.pdf"〉In Memoriam Wilhelm Hiller〈/a〉〈br〉 (Schneider, Götz)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0043.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Wilhelm, H., Neubauer, F. M., Schopper, J. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0044.pdf"〉Joint Two-Dimensional Observations of Ground Magnetic and Ionospheric Electric Fields Associated with Auroral Zone Currents〈/a〉〈br〉 (Inhester, B., Baumjohann, W., Greenwald, R. A., Nielsen, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0045.pdf"〉Current Flow in Auroral Forms Responsible for Ps 6 Magnetic Disturbances〈/a〉〈br〉 (Rostoker, G., Apps, K. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0046.pdf"〉Correlation of Geomagnetic Activity Indices ap with the Solar Wind Speed and the Southward Interplanetary Magnetic Field〈/a〉〈br〉 (Schreiber, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0047.pdf"〉High Time-Resolution Correlation Between the Magnetic Field Behaviour at 37 〈i〉R〈/i〉〈sub〉E〈/sub〉 Distance in the Magnetotail Plasma Sheet and Ground Phenomena During Substrom Expansive Phase〈/a〉〈br〉 (Sergeev, V. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0048.pdf"〉Simultaneous Observations of Energetic Protons Close to the Bow Shock and Far Upstream〈/a〉〈br〉 (Scholer, M., Ipavich, F. M., Gloeckler, G., Hovestadt, D.)〈/a〉〈/li〉 〈li〉〈a href=" https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0049.pdf"〉Non-Adiabatic Expansion of Low-Temperature Solar Wind Radial Temperature Gradients〈/a〉〈br〉 (Geranios, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0050.pdf"〉Correlation Between Seismic Microactivity, Temperature and Subsidence of Water Level at Reservoirs〈/a〉〈br〉 (Merkler, G., Bock, G., Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0052.pdf"〉〈sup〉40〈/sup〉Ar/〈sup〉39〈/sup〉Ar Dating of Himalayan Rocks from the Mount Everest Region〈/a〉〈br〉 (Kaneoka, Ichiro, Kono, Masaru)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0053.pdf"〉A Comparison of the Thermal and Mechanical Structure of the Lithosphere Beneath the Bohemian Massif and the Pannonian Basin〈/a〉〈br〉 (Onuoha, K. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0054.pdf"〉Extremal Models for Electromagnetic Induction in Two-Dimensional Perfect Conductors〈/a〉〈br〉 (Weidelt, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0055.pdf"〉On a Type Classification of Lower Crustal Layers Under Precambrian Regions〈/a〉〈br〉 (Jones, A. G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0056.pdf"〉Spherical-Earth Gravity and Magnetic Anomaly Modeling by Gauss-Legendre Quadrature Integration〈/a〉〈br〉 (Frese, R. R. B., Hinze, W. J., Braile, L. W., Luca, A. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0057.pdf"〉Detection Probabilities for Earthquakes in Sweden〈/a〉〈br〉 (Shapira, A., Kulhánek, O., Wahlström, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0058.pdf"〉The Geocyclotron Revisited: Potentialities of Modulated Wave Injection〈/a〉〈br〉 (Brinca, A. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0059.pdf"〉Eine kleine Historie zur Namengebung der Fachdisziplin Geophysik〈/a〉〈br〉 (Buntebarth, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0049/LOG_0060.pdf"〉〈i〉Correction〈/i〉: High Precision Measurement of the Frequency of Mode 〈sub〉0〈/sub〉S〈sub〉0〈/sub〉〈/a〉〈br〉 (Zürn, W., Knopoff, L., Rydelek, P. A.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aeronomy ; Aurora ; Canada ; Electromagnetism ; Geomagnetism ; Geomagnetismus ; Geophysics ; Geophysik ; Himalaya ; India ; Ionosphere ; Ionosphäre ; Italy ; Lithosphere ; Lithosphäre ; Magnetotellurics ; Magnetotellurik ; Moon ; Morocco ; Palaeomagnetism ; Paläomagnetismus ; Rock Magnetism ; Seismology ; Seismologie ; Siberia ; Waves ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 4
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 41 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:41
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 58 Artikel zu Themengebieten der Seismologie, Erdmagnetismus und Gesteinsphysik veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1975.
    Description: Inhaltsverzeichnis: Journal of Geophysics 41 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0011.pdf"〉Statistical Behaviour of Elastic Waves in a Reverberating Solid〈/a〉〈br〉 (Drisler, J., Antony-Spies, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0013.pdf"〉A Compressed Air Gun Accelerator for Shock Magnetization and Demagnetization Experiments up to 20 kbar〈/a〉〈br〉 (Hornemann, U., Pohl, J., Bleil, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0014.pdf"〉Shock Magnetization and Demagnetization of Basalt by Transient Stress up to 10 kbar〈/a〉〈br〉 (Pohl, J., Bleil, U., Hornemann, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0015.pdf"〉K-Ar-Altersbestimmungen an Vulkaniten bekannter paläomagnetischer Feldrichtung〈/a〉〈br〉 (Todt, W., Lippolt, H. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0017.pdf"〉Dispersed Shots at Optimum Depth - An Efficient Seismic Source for Lithospheric Studies〈/a〉〈br〉 (Jacob, A. W. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0018.pdf"〉Crustal Structure and 〈i〉P〈/i〉-Wave Travel Time Anomalies at NORSAR〈/a〉〈br〉 (Berteussen, K. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0019.pdf"〉Electromagnetic Induction in Three-Dimensional Structures〈/a〉〈br〉 (Weidelt, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0021.pdf"〉Acoustic Normal Modes Generated by Explosive Sources〈/a〉〈br〉 (Essen, H.-H., Kebe, H.-W., Siebert, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0022.pdf"〉Hydromagnetic Waves in a Non-Uniform Plasma〈/a〉〈br〉 (Kupfer, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0023.pdf"〉Time-Domain Electromagnetic INPUT Rresponse of a Conducting Horizontal Thin Sheet〈/a〉〈br〉 (Mallick, K., Jain, S. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0024.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Walk, O.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0025.pdf"〉Seismic Investigation along the Scandinavian "Blue Road" Traverse〈/a〉〈br〉 (Hirschleber, H. B., Lund, C.-E., Meissner, R., Vogel, A., Weinrebe, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0028.pdf"〉Computations of 〈i〉SV〈/i〉 Waves in Realistic Earth Models〈/a〉〈br〉 (Kind, R., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0030.pdf"〉On Tracing Seismic Rays with Specified End Points〈/a〉〈br〉 (Chander, Ramesh)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0031.pdf"〉Geothermal Models of the Ivrea-Zone〈/a〉〈br〉 (Höhndorf, A., Haenerl, R., Giesel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0033.pdf"〉A Note on the Palaeomagnetism of the Late Precambrian Malani Rhyolites near Jodhpur - India〈/a〉〈br〉 (Klootwijk, C. T.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0035.pdf"〉An Evaluation Method Combining the Differential Doppler Measurements from Two Stations that Enables the Calculation of the Electron Content of the Ionosphere〈/a〉〈br〉 (Leitinger, R., Schmidt, G., Tauriainen, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0037.pdf"〉Measured and Calculated Secondary Electron Energy Spectra (20 - 1500 eV) above 120 km〈/a〉〈br〉 (Loidl, A., Schlegel, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0038.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Mayer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0039.pdf"〉The Behaviour of Minor Species in the Solar Wind〈/a〉〈br〉 (Ryan, J. M., Axford, W. I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0040.pdf"〉The Effect of Low Energetic Electrons in the Polar Ionosphere〈/a〉〈br〉 (Hartmann, G. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0041.pdf"〉Transmission of Electric Fields and Photoelectron Fluxes Between Conjugate Ionospheric F2-Regions〈/a〉〈br〉 (Petelski, E. F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0043.pdf"〉Characteristics of Azimuth Independent Optimum Velocity Filters Designed for Two-Dimensional Arrays〈/a〉〈br〉 (Hubral, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0045.pdf"〉Travel Time Residuals in the Iranian Plateau〈/a〉〈br〉 (Akasheh, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0046.pdf"〉Noise Variance Fluctuations and Earthquake Detectability〈/a〉〈br〉 (Steinert, O., Husebye, S., Gjøystdal, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0048.pdf"〉An Electronic Filter and Damping System for the Askania Borehole Tiltmeter〈/a〉〈br〉 (Flach, D., Große-Brauckmann, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0049.pdf"〉Two-Dimensional Magnetotelluric Model Calculations for Overhanging, High-Resistivity Structures〈/a〉〈br〉 (Losecke, W., Müller, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0052.pdf"〉A New Type of Vertical Gravity Gradiometer〈/a〉〈br〉 (Groten, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0053.pdf"〉Letters to the Editors: Comment on Hydromagnetic Waves in a Non-Uniform Plasma by E. Kupfer〈/a〉〈br〉 (Siebert, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0054.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Wilhelm, H., Burkhardt, H., Strobach, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0055.pdf"〉Deep Structure of the Southern Rhinegraben Area from Seismic Refraction Investigations〈/a〉〈br〉 (Edel, J. B., Fuchs, K., Gelbke, C., Prodehl, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0058.pdf"〉Faeroe Islands - a Microcontinental Fragment? 〈/a〉〈br〉 (Casten, U., Hedebol Nielsen, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0059.pdf"〉A Seismic Reflection Method for Solving Engineering Problems〈/a〉〈br〉 (Schepers, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0061.pdf"〉The Palaeomagnetism of Age Dated Tertiary Volcanites of the Monti Lessini (Northern Italy) and its Implication to the Rotation of Northern Italy〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0064.pdf"〉Rock Magnetism of the Monti Lessini and Monte Berici Volcanites and Age of Volcanism Deduced from the Heirtzler Polarity Time Scale〈/a〉〈br〉 (Soffel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0065.pdf"〉Supersonic Plasma Flow Between High Latitude Conjugate Ionospheres〈/a〉〈br〉 (Rösler, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0066.pdf"〉Crustal Structure of the Aegean Sea and the Hellenides Obtained from Geophysical Surveys〈/a〉〈br〉 (Makris, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0068.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Neubauer, F. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0069.pdf"〉Synthetic Seismograms of PS-Reflections from Transition Zones Computed with the Reflectivity Method〈/a〉〈br〉 (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0071.pdf"〉Explosions in Shallow Water for Deep Seismic Sounding Experiments〈/a〉〈br〉 (Burkhardt, H., Vees, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0073.pdf"〉Seegangserzwungene elastische Bewegungen des Nordseebodens〈/a〉〈br〉 (Janle, P., Rudloff, R., Schmalfeldt, B., Szelwis, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0077.pdf"〉Interpretation of a Gravity Profile Across the Southern Part of the Hon Graben, Libya〈/a〉〈br〉 (Soffel, H., Peters, K., Pohl, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0079.pdf"〉A Comparison of Methods for Computing Surface Densities of the Geopotential from Satellite Altimetry〈/a〉〈br〉 (Benning, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0080.pdf"〉An Economically Working Method for Computing the Gravimetric Terrain Correction〈/a〉〈br〉 (Boedecker, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0081.pdf"〉Pressure Dependence of Elastic Wave Characteristics of Ultramafic Rocks of India〈/a〉〈br〉 (Ramana, Y. V., Rao, M. V. M. S., Gogte, B. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0082.pdf"〉Paleogravity - A Possible Chance for Determination of Paleo-Geographic North〈/a〉〈br〉 (Stegena, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0083.pdf"〉Electromagnetic Induction at Dili, Portuguese Timor〈/a〉〈br〉 (Chamalaun, F. H., White, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0084.pdf"〉Preliminary Polar Wander Path of Central Iran〈/a〉〈br〉 (Soffel, H., Förster, H., Becker, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0085.pdf"〉Ein astasiertes Vertikalpendel mit tragender Blattfeder〈/a〉〈br〉 (Wielandt, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0086.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Schneider, G., Suchy, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0087.pdf"〉Wave and Particle Observations by Explorer 45 Pertaining to Wave-Particle Interactions〈/a〉〈br〉 (Fritz, T. A., Williams, D. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0093.pdf"〉Probability Distribution of Earthquake Accelerations with Applications to Sites in the Northern Rhine Area, Central Europe〈/a〉〈br〉 (Ahorner, L., Rosenhauer, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0095.pdf"〉〈i〉P〈/i〉 Wave Amplitude Variability at NORSAR〈/a〉〈br〉 (Berteussen, K. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0096.pdf"〉Magnetic Hysteresis Loops and Magnetization Versus Temperature Curves of Some Basalt Samples Containing Titanomagnetite Ore either Single-Phase or with an Intergrowth of Ilmenite Lamellae〈/a〉〈br〉 (Schmidbauer, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0098.pdf"〉The Change of Isothermal Saturation Rremanent Magnetization of Basalts as a Result of Cyclic Elastic Deformation〈/a〉〈br〉 (Kapička, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0100.pdf"〉K-Ar-Altersbestimmungen an Vulkaniten bekannter paläomagnetischer Feldrichtung, II. Sachsen〈/a〉〈br〉 (Todt, W., Lippolt, H. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0102.pdf"〉An Anomaly of the Upper Mantle Below the Rhine Graben, Studied by the Inductive Response of Natural Electromagnetic Fields〈/a〉〈br〉 (Reitmayr, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0103.pdf"〉Some Problems of Large-Scale Gravity Interpretation〈/a〉〈br〉 (Groten, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0041/LOG_0106.pdf"〉[Rezensionen] 〈/a〉〈br〉 (Haack, V., Höschele, K.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aegan Sea ; Applied Geophysics ; Seismology ; Atlantic Ocean ; Electrical Conductivity Anomalies ; Crustal Structure ; Doppler Effect ; Earthquakes ; Electromagnetism ; Faeroe Islands ; Germany ; Gravimetrie ; Gravimetry ; Greece ; India ; Ionosphere ; Ionosphäre ; Iran ; Libya ; Magnetosphere ; Paleomagnetism ; Rock Magnetism ; Seismology ; Solar Wind ; Tiltmeter ; Elastic Wave ; Volcanics ; Waves ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 5
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    Journal of Geophysics - Zeitschrift für Geophysik 43 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:43
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 78 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1977.
    Description: Inhaltsverzeichnis: Journal of Geophysics 43 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0012.pdf"〉Editors' Preface〈/a〉〈br〉 (Fuchs, K., Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0013.pdf"〉Full Wave Theory Applied to a Discontinuous Velocity Increase: The Inner Core Boundary〈/a〉〈br〉 (Cormier, V. F., Richards, P. G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0016.pdf"〉Propagation of Elastic Waves in Vertically Inhomogeneous Media〈/a〉〈br〉 (Ungar, A., Ilan, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0017.pdf"〉Finite-Difference Modelling for P-Pulse Propagation in Elastic Media with Arbitrary Polygonal Surface〈/a〉〈br〉 (Ilan, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0020.pdf"〉Extension of Matrix Methods to Structures with Slightly Irregular Stratification〈/a〉〈br〉 (Cisternas, A., Jobert, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0021.pdf"〉Modal Approach to Wave Propagation in Layered Media with Lateral Inhomogeneities〈/a〉〈br〉 (Saastamoinen, P. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0022.pdf"〉On the Propagation of Seismic Pulses in a Porous Elastic Solid〈/a〉〈br〉 (Mainardi, F., Servizi, G., Turchetti, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0023.pdf"〉Three-Dimensional Seismic Ray Tracing〈/a〉〈br〉 (Julian, B. R., Gubbins, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0025.pdf"〉On Geophysical Inverse Problems and Constraints〈/a〉〈br〉 (Sabatier, P. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0027.pdf"〉On Impulse Response Data and the Uniqueness of the Inverse Problem〈/a〉〈br〉 (Barcilon, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0028.pdf"〉Least-Squares Collocation and the Gravitational Inverse Problem〈/a〉〈br〉 (Moritz, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0029.pdf"〉The Statistical Description and Interpretation of Geophysical Potential Fields Using Covariance Functions〈/a〉〈br〉 (Kautzleben, H., Harnisch, M., Schwahn, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0030.pdf"〉A Finite Element Program Package for Electromagnetic Modeling〈/a〉〈br〉 (Kaikkonen, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0032.pdf"〉Linear Inverse Problem in Gravity Profile Interpretation〈/a〉〈br〉 (Vigneresse, J. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0034.pdf"〉Data Seizing and Information Processing〈/a〉〈br〉 (Picard, C. F., Sallantin, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0035.pdf"〉Formal Morphostructural Zoning of Mountain Territories〈/a〉〈br〉 (Alekseevskaya, M., Gabrielov, A., Gel’fand, I., Gvishiani, A., Rantsman, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0036.pdf"〉Three Dimensional Seismic Velocity Anomalies in the Lithosphere〈/a〉〈br〉 (Aki, Keiiti)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0038.pdf"〉The Inversion of Long Range Seismic Profiles〈/a〉〈br〉 (Kennett, B. L. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0040.pdf"〉An Oceanic Long Range Explosion Experiment〈/a〉〈br〉 (Orcutt, J. A., Dorman, L. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0041.pdf"〉The Upper Mantle Under Western Europe Inferred from the Dispersion of Rayleigh Modes〈/a〉〈br〉 (Nolet, Guust)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0044.pdf"〉Global and Regional Phase Velocities of Long-Period Fundamental Mode Rayleigh Waves〈/a〉〈br〉 (Mitronovas, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0045.pdf"〉The Inversion of Surface Wave Dispersion Data with Random Errors〈/a〉〈br〉 (Knopoff, L., Chang, F.-S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0048.pdf"〉Finite Difference Calculation of Stress Relaxation Earthquake Models〈/a〉〈br〉 (Stöckl, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0050.pdf"〉On Equivalent Models of Seismic Sources〈/a〉〈br〉 (Jobert, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0051.pdf"〉A Method for Synthesis of the Seismic Coda of Local Earthquakes〈/a〉〈br〉 (Herrmann, R. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0055.pdf"〉Application of Two-Timing Methods in Statistical Geophysics〈/a〉〈br〉 (Hasselmann, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0056.pdf"〉Scattered Waves in the Coda of P〈/a〉〈br〉 (Hudson, J. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0057.pdf"〉Elastic Wave Propagation in a Highly Scattering Medium – A Diffusion Approach〈/a〉〈br〉 (Dainty, A. M., Toksöz, M. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0058.pdf"〉Seismic Energy Transmission in an Intensively Scattering Environment〈/a〉〈br〉 (Nakamura, Yosio)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0060.pdf"〉Scattering of Rayleigh Waves by a Ridge〈/a〉〈br〉 (Sabina, F. J., Willis, J. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0061.pdf"〉Mean-Field Electrodynamics and Dynamo Theory of the Earth's Magnetic Field〈/a〉〈br〉 (Krause, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0064.pdf"〉An Example of Nonlinear Dynamo Action〈/a〉〈br〉 (Busse, F. H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0065.pdf"〉Energetics of the Earth's Core〈/a〉〈br〉 (Gubbins, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0066.pdf"〉Equation of State of Liquid Iron at the Earth's Core Conditions〈/a〉〈br〉 (Boschi, E., Mulargia, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0067.pdf"〉Lithospheric Slab Penetration into the Lower Mantle beneath the Sea of Okhotsk〈/a〉〈br〉 (Jordan, T. H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0069.pdf"〉〈i〉Abstracts and Short Communications〈/i〉〈/a〉〈br〉〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0068.pdf"〉Phenomenological Representation of Seismic Sources〈/a〉〈br〉 (Backus, G., Mulcahy, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0070.pdf"〉The Influence of the Core and the Oceans on the Chandler Wobble〈/a〉〈br〉 (Dahlen, F. A., Smith, M. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0071.pdf"〉The Earth's Core-Mantle Interface Revisited〈/a〉〈br〉 (Hide, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0072.pdf"〉Seismic Observations of Structure and Physical Properties of the Subcrustal Lithosphere as Evidence for Dynamical Processes in the Upper Mantle〈/a〉〈br〉 (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0073.pdf"〉Seismic Anisotropy – a Summary〈/a〉〈br〉 (Crampin, Stuart)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0074.pdf"〉Precise Continuous Monitoring of Seismic Velocity Variations〈/a〉〈br〉 (Bungum, H., Risbo, T., Hjortenberg, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0075.pdf"〉On the Computation of Theoretical Seismograms for Multimode Surface Waves〈/a〉〈br〉 (Calcagnile, G., Panza, G. F., Schwab, F., Kausel, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0076.pdf"〉On the Excitation of the Earth's Seismic Normal Modes〈/a〉〈br〉 (Vlaar, N. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0077.pdf"〉Seismic Velocities and Density of an Attenuating Earth〈/a〉〈br〉 (Hart, R. S., Anderson, D. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0078.pdf"〉A First-Motion Alternative to Geometrical Ray Theory〈/a〉〈br〉 (Chapman, C. H., Dey Sarkar, S. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0079.pdf"〉Heterogeneous Velocity Structure at the Base of the Mantle〈/a〉〈br〉 (Snoke, J. A., Sacks, I. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0080.pdf"〉Heterogeneous velocity structure at the base of the mantle〈/a〉〈br〉 (Sacks, I. S., Snoke, J. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0081.pdf"〉Theoretical Seismograms of Core Phases Calculated by a Frequency-Dependent Full Wave Theory, and Their Interpretation〈/a〉〈br〉 (Choy, G. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0082.pdf"〉Amplitudes of Long-Period PcP, SKS and SKKS and the Structure at the Base of the Mantle and in the Outer Core〈/a〉〈br〉 (Müller, G., Kind, R., Mula, A., Gregersen, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0083.pdf"〉Relative Errors in Group Velocity Measurements〈/a〉〈br〉 (Knopoff, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0084.pdf"〉The Propagation of Plasma Waves in the Jovian Magnetosphere〈/a〉〈br〉 (Denskat, K. U., Neubauer, F. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0085.pdf"〉Statistical Theory of Electromagnetic Induction in Thin Sheets〈/a〉〈br〉 (Treumann, R., Schäfer, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0086.pdf"〉Precursors to P' P' and Upper Mantle Discontinuities〈/a〉〈br〉 (Husebye, E. S., Haddon, R. A. W., King, D. W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0090.pdf"〉Mantle Heterogeneity and Mislocation Patterns for Seismic Networks〈/a〉〈br〉 (Vermeulen, J. M., Doornbos, D. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0093.pdf"〉Correlation Between Micro-Activity and Variation of Water Level at the Schlegeis-Reservoir〈/a〉〈br〉 (Blum, R., Bock, G., Fuchs, K., Merkler, G., Widmann, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0095.pdf"〉Attenuation Coefficients of Acoustic Normal Modes in Shallow Water〈/a〉〈br〉 (Essen, H.-H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0096.pdf"〉Relation of Gravity to Elevation in Zambia〈/a〉〈br〉 (Töpfer, K. D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0098.pdf"〉Albert Defant (1884 - 1974) 〈/a〉〈br〉 (Krauß, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0099.pdf"〉Study of the Structure of the Lower Lithosphere by Explosion Seismology in the USSR〈/a〉〈br〉 (Ryaboy, V. Z.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0102.pdf"〉P-Wave Amplitudes and Sources of Scattering in 〈i〉m〈/i〉〈sub〉b〈/sub〉-Observations〈/a〉〈br〉 (Ringdal, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0104.pdf"〉Analyse von Mikroseismikmessungen auf Sylt〈/a〉〈br〉 (Szelwis, R., Janle, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0107.pdf"〉Improved Technique for Rapid Interpretation of Gravity Anomalies Caused by Two-Dimensional Sedimentary Basins〈/a〉〈br〉 (Töpfer, K. D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0109.pdf"〉Investigation of Isostasy by Computing the Correlation Coefficients between Elevations and Bouguer Anomalies〈/a〉〈br〉 (Janle, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0110.pdf"〉Geoelectrical Deep Soundings in Southern Africa Using the Cabora Bassa Power Line〈/a〉〈br〉 (Blohm, E. K., Worzyk, P., Scriba, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0112.pdf"〉Spectral Characteristics of Cross-Field and Two Stream Instability as Revealed by Rocket Borne Studies〈/a〉〈br〉 (Gupta, S. P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0113.pdf"〉〈i〉Short Communication〈/i〉 Observation of PS Reflections from the Moho〈/a〉〈br〉 (Jacob, A. W. B., Booth, D. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0115.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Makris, J., Weigel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0116.pdf"〉Planetarische Dynamos〈/a〉〈br〉 (Stix, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0117.pdf"〉〈i〉Original Investigations〈/i〉 A Note on the Post-Rosenbluth Quasilinear Diffusion Coefficient in the Ring Current Region〈/a〉〈br〉 (Treumann, R., Grafe, A., Lehmann, H.-R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0118.pdf"〉Remote Sensing Experiment for Magnetospheric Electric Fields Parallel to the Magnetic Field〈/a〉〈br〉 (Wilhelm, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0119.pdf"〉A Study of the Echzell/Wetterau Earthquake of November 4, 1975〈/a〉〈br〉 (Neugebauer, H. J., Tobias, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0121.pdf"〉Thermoelastic Deformations of a Half-Space – A Green's Function Approach〈/a〉〈br〉 (Müller, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0123.pdf"〉Gravity Variations with Time in Northern Iceland 1965–1975〈/a〉〈br〉 (Torge, W., Drewes, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0125.pdf"〉High Resolution Near Surface Reflection Measurements Using a Vertical Array Technique〈/a〉〈br〉 (Schepers, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0127.pdf"〉Ausbreitung von Rayleigh-Kanalwellen in Steinkohleflözen – Modellseismische Untersuchungen〈/a〉〈br〉 (Freystätter, S., Dresen, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0129.pdf"〉Comment on: Hydromagnetic Waves in a Non-Uniform Plasma〈/a〉〈br〉 (Kupfer, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0130.pdf"〉〈i〉Book Reviews〈/i〉〈/a〉〈br〉 (Kisslinger, C., Klußmann, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0043/LOG_0131.pdf"〉〈i〉Erratum〈/i〉 Full Wave Theory Applied to a Discontinuous Velocity Increase: The Inner Core Boundary〈/a〉〈br〉 (Cormier, V. F., Richards, P. G.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: Dynamo Theory
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Africa ; Dynamo Theory ; Earthquakes ; Earth's Core ; Engineering Seismics ; Seismology ; Seismologie ; Geomagnetism ; Gravity ; Iceland ; Lithosphere ; Lithosphäre ; Magnetosphere ; Plasma Waves ; Seismic Waves ; Waves ; Wellen ; Geophysik ; Geophysics ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    Zeitschrift für Geophysik 36 / 5 (2019)
    Physika-Verlag, Würzburg
    In:  Herausgeberexemplar | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1970.
    Description: 〈ul style="line-height:2;"〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0113.pdf"〉Heft 5〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0114.pdf"〉Titelseite〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0115.pdf"〉Inhaltsverzeichnis〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0116.pdf"〉[Impressum]〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0117.pdf"〉A Possible Scattering Mechanism for Lunar Seismic Waves (Berckhemer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0119.pdf"〉On the Determination of Velocity Depth Distributions of Elastic Waves from the Dynamic Characteristics of the Reflected Wave Field (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0125.pdf"〉Auswertung seeseismischer Messungen mit einer digitalen Methode unter Anwendung der Theorie der Schallwellenausbreitung im Flachwasser (Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0128.pdf"〉On Chemical Magnetization in Some Permian Lava Flows of Southern Norway (Storetvedt, K. M., Petersen, N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0132.pdf"〉Auswertung von Gravimeter-Messungen in der Münchberger Gneismasse längs eines Profils von Konradsreuth nach Niederlamitz (Soffel, H., Peters, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0133.pdf"〉Deutung der Schwereanomalien im Nördlinger Ries (Kahle, H.-G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0135.pdf"〉Eine Methode zur direkten Bestimmung der sogenannten "Geometrischen Tortuosität" (Bitterlich, W., Wöbking, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0137.pdf"〉Observations With Synchronously-Offset Beams on a 77 km path at 1.8 and 4 cm (Jeske, H., Seehars, H. D., Pucher, G., Cassebaum, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0139.pdf"〉Scattering of Seismic Waves and Lunar Seismograms (Strobach, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0140.pdf"〉Berechnung eines Stromsystems in der Polaren E-Region (Czechowsky, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0141.pdf"〉Mitteilung〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0142.pdf"〉Buchbesprechungen (Zürn, W., Seiler, E., Theile, B., Diem, Walk, )〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0143.pdf"〉[Werbung]〈/a〉〈/li〉 〈/ul〉
    Description: research
    Description: DFG, SUB Göttingen, DGG
    Keywords: 550 ; Geophysik ; Erdmagnetismus ; Geomagnetismus ; Gravitation ; Gravimetrie ; Seismik ; Seismology ; Strahlung ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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  • 7
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    Analysis of the source parameters behaviour during the Val D'Agri test-injection (Italy) (2019)
    Details
    Publication Date: 2019-03-27
    Description: Recent advances in understanding induced earthquake mechanics are due to the new and high-quality observations from seismic signals, natural faults and laboratory experiments. The synergy of different approaches allows the acquisition of useful observations to understand the earthquake source process. In this study we investigate the source parameters behaviour of induced earthquakes recorded during daily injection tests in a wastewater disposal well in Val D’Agri (VDA, Italy). We choose this area because of its complexity and particularity. VDA is a Quaternary extensional basin located in the Southern Apennines characterized by a complex tectonic evolution, high seismic hazard and significant hydrocarbon exploitation. The basin hosts the largest onshore oilfield in Europe that produces oil and associated gas from low- porosity, fractured Cretaceous limestone. Wastewater associated to hydrocarbon production is reinjected into the Costa Molina 2 high-rate well (CM2) into an unproductive marginal portion of the carbonate reservoir at 2890-3096 m depth (b.s.l.). Initial injection tests were performed from 2 to 12 June 2006 with variable duration (from 4 to 32 hr) and hourly injection rate of 38 m3/hr. During the tests a maximum well-head pressure of 101 bar was measured. These tests induced a swarm microseismicity (69 events, ML comprised by 0.3 and 1.8) recorded by a high-performance local network run by INGV (Mc 0.4, 23 stations) that constitutes our testing data-set. We investigate the full moment tensors decomposing them in Double-Couple (DC), Isotropic (ISO) and Compensated Linear Vector Dipole (CLVD) components by using HybridMT technique. We obtain significant contribution of %ISO and %CLVD components that tend to increase with time. Also, we compute the moment magnitudes (that we compare with ML) and the static stress drops (by spectral analysis). Finally, we discuss each analysed source parameter as a function of the injection pressure curve in the geological/tectonic contest.
    Description: Published
    Description: Malta
    Description: 3T. Sorgente sismica
    Keywords: Seismology ; Source Analysis ; Solid Hearth
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: Poster session
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  • 8
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    AlpArray in Hungary: temporary and permanent seismological networks in the transition zone between the Eastern Alps and the Pannonian basin (2019)
    Details
    Publication Date: 2019-03-07
    Description: In the last few decades dense large-scale seismic networks showed their importance in studying the structure of the lithosphere and the upper mantle. The better understanding of the Apennines–Alps–Carpathian–Dinarides system is the main target of the AlpArray European international initiative in which more than 50 institutes are involved. The core of AlpArray is the AlpArray Seismic Network (AASN). With its 􏰖 600 broadband seismic stations ( 􏰖 280 of which are temporary) the AASN is, so far, the largest passive seismic experiment in Europe. The MTA CSFK Geodetic and Geophysical Insti- tute, as a Core Member of the AlpArray project, contributes to the AlpArray Seismic Network with its entire permanent network as well as with 11 temporary broadband seismic stations deployed in Western Hungary. Three additional station equipment were provided by the Swiss-AlpArray SINERGIA program. The average station distance together with the permanent stations is around 40 km in the area of interest. The temporary network has been installed between December 2015 and July 2016 and the planned operation period is 3 years. In this paper we describe the characteristics of the 29 per- manent and temporary stations, introducing not only the equipment, but the location, housing and geological setting, as well. We present median power spectral density curves in order to characterise the noise conditions at each station.
    Description: Hungarian Academy of Sciences (Grants EU-04/2014, EU-07/2015); Swiss-AlpArray SINERGIA Project CRSII2_154434/1 by the Swiss National Science Foundation (SNSF)
    Description: Published
    Description: 221–245
    Description: 1IT. Reti di monitoraggio
    Description: 5IT. Osservatori
    Description: JCR Journal
    Keywords: AlpArray ; Temporary seismic network ; Seismic noise ; Hungarian National Seismological Network ; Pannonian basin ; Solid Earth ; Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 9
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    Journal of Geophysics - Zeitschrift für Geophysik 59 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 32 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1983.
    Description: Inhaltsverzeichnis: Journal of Geophysics 59 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0011.pdf"〉The detailed velocity structure of the Urach geothermal anomaly〈/a〉〈br〉 (Walther, C., Trappe, H., Meissner, R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0012.pdf"〉The effect of 〈i〉SKS〈/i〉 scattering on models of the shear velocity-structure of the D" region〈/a〉〈br〉 (Lay, T., Young, C.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0013.pdf"〉Spheroidal and torsional global response functions〈/a〉〈br〉 (Wilhelm, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0014.pdf"〉Magnetometer array studies on southeastern Finland on the Baltic shield〈/a〉〈br〉 (Pajunpää, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0016.pdf"〉Magnetovariational and magnetotelluric studies of the Oulu anomaly on the Baltic Shield in Finland〈/a〉〈br〉 (Korja, T., Zhang, P., Pajunpää, K.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0018.pdf"〉Glacio-isostatic adjustment in Fennoscandia revisited〈/a〉〈br〉 (Wolf, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0019.pdf"〉Modelling active audio-magnetotelluric data〈/a〉〈br〉 (Fischer, G., Schnegg, P.-A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0020.pdf"〉A comparison of upper mantle subcontinental electrical conductivity for North America, Europe, and Asia〈/a〉〈br〉 (Campbell, W. H., Schiffmacher, E. R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0021.pdf"〉Paleomagnetism of the tertiary intrusives from Chalkidiki (northern Greece)〈/a〉〈br〉 (Kondopoulou, D., Westphal, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0022.pdf"〉Absolute intensity of daytime whistlers at low and middle latitudes and its latitudinal variation〈/a〉〈br〉 (Hayakawa, M., Tanaka, Y., Ohta, K., Okada, T.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0023.pdf"〉Electric fields and currents at the Harang discontinuity: a case study〈/a〉〈br〉 (Kunkel, T., Baumjohann, W., Untiedt, J., Greenwald, R. A.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0024.pdf"〉〈i〉Erratum.〈/i〉 In-situ permeability from non-dilatational soil deformation caused by groundwater pumping – a case study〈/a〉〈br〉 (Kümpel, H.-J., Lohr, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0025.pdf"〉Book reviews〈/a〉〈br〉 (Jentzsch, G., Jacoby, W.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0026.pdf"〉A conceptual model of core dynamics and the earth's magnetic field〈/a〉〈br〉 (Officer, C. B.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0027.pdf"〉Paleomagnetism of Miocene volcanism from South Syria〈/a〉〈br〉 (Roperch, P., Bonhommet, N.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0028.pdf"〉Periadriatic lineament in the Alps studied by magnetotellurics〈/a〉〈br〉 (Ádám, A., Duma, G., Gutdeutsch, R., Verő, J., Wallner, Á.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0031.pdf"〉Comparison of fault-plane solutions and moment tensors〈/a〉〈br〉 (Hinzen, K.-G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0032.pdf"〉A teleseismic study of the Upper Rhinegraben area: array mislocation diagram and 3-D velocity inversion〈/a〉〈br〉 (Granet, M.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0033.pdf"〉Interactive high-resolution polarization analysis of broad-band seismograms〈/a〉〈br〉 (Plešinger, A., Hellweg, M., Seidl, D.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0035.pdf"〉The relationship between the polarization of whistlers and their dispersion〈/a〉〈br〉 (Shimakura, S., Okada, T., Hayakawa, M., Tanaka, Y.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0036.pdf"〉A simple statistical model on the degree of interconnection on partially molten rocks〈/a〉〈br〉 (Schmeling, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0037.pdf"〉Book reviews〈/a〉〈br〉 (Hansen, C. J., Jentzsch, G.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0038.pdf"〉Complete seismogram synthesis for transversely isotropic media〈/a〉〈br〉 (Mandal, B., Mitchell, B. J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0039.pdf"〉The influence of a dilatant region in the Earth's crust on the Earth tide tilt and strain〈/a〉〈br〉 (Kirsch, R., Zschau, J.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0040.pdf"〉The influence at atmospheric loading on VLBI-experiments〈/a〉〈br〉 (Rabbel, W., Schuh, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0041.pdf"〉Discrete frequency inequalities for magnetotelluric impedances of one-dimensional conductors〈/a〉〈br〉 (Weidelt, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0042.pdf"〉Thermally stimulated currents in rocks〈/a〉〈br〉 (Dologlou-Revelioti, E., Varotsos, P.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0043.pdf"〉Magnetostratigraphy of Neogene equatorial Pacific pelagic sediments〈/a〉〈br〉 (Weinreich, N., Theyer, F.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0045.pdf"〉Deconvolution as a method for the separation of Pi2 pulsations from background field variations〈/a〉〈br〉 (Behrens, J., Glaßmeier, K.-H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0046.pdf"〉〈i〉Laudatio〈/i〉. Presentation of the Emil Wiechert Medal to Don L. Anderson, Pasadena〈/a〉〈br〉 (Soffel, H.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0047.pdf"〉〈i〉Correction〈/i〉. A comparison of upper mantle subcontinental electrical conductivity for North America, Europe and Asia〈/a〉〈br〉 (Campbell, W. H., Schiffmacher, E. R.)〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0059/LOG_0048.pdf"〉Book reviews〈/a〉〈br〉 (Kertz, W., Schwentek, H., Jacoby, W. R.)〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DGG, DFG, SUB Göttingen
    Keywords: 550 ; Geophysik ; Alps ; Broad-band seismology ; Deconvolution ; Deep Sea Drilling Project ; Deformation of earth’s surface ; Dilatancy ; Dynamo theory ; Earth currents ; Earth tides ; Earth’s core ; Earth’s crust ; Earth’s Mantle ; Electrical Conductivity of the Earth ; Electromagnetic Induction ; Fault plane solutions ; Free oscillations of earth ; Geomagnetic pulsations ; Geothermics ; Germany ; Global positioning ; Gräfenberg seismic array ; Greece ; Harang discontinuity ; Inverse problems ; lonospheric electric field ; lsostasy ; Magnetic field of earth ; Magnetometer array studies ; Magnetosphere ; Magnetostratigraphy ; Magnetotellurics ; Pacific ; Paleomagnetism ; Partial melts ; Polar ionosphere ; Polar magnetic substorms ; Rhinegraben ; Rock Physics ; Scandinavia ; Seismics ; Seismic Moment tensor ; Seismic wave propagation ; Seismology ; Synthetic seismograms ; Syria ; Very Long Baseline Interferometry ; Viscosity of earth’s mantle ; Whistlers ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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  • 10
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    Zeitschrift für Geophysik 36 / 4 (2019)
    Physika-Verlag, Würzburg
    In:  Herausgeberexemplar | 8 Z NAT 2148
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält Artikel zu Themengebieten des Erdmagnetismus und der Ionosphäre, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1970.
    Description: 〈ul style="line-height:2;"〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0088.pdf"〉Heft 4〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0089.pdf"〉Titelseite〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0090.pdf"〉Inhaltsverzeichnis〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0091.pdf"〉[Impressum]〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0092.pdf"〉Geophysics and Germany, Men and Enterprises (Chapman, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0093.pdf"〉Investigation of the Auroral Electrojet (Heinrich, H., Reimer, D., Siemann, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0095.pdf"〉Plasmamessungen im Polarlicht-Elektrojet und daraus erschlossene elektrische Felder (Kist, R., Spenner, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0097.pdf"〉Polarisationsmessungen an künstlichen Bariumwolken (Möller, G. F., Haser, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0098.pdf"〉Der Forschungssatellit AZUR (Keppler, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0101.pdf"〉Crustal Structure of the Western United States from Seismic-Refraction Measurements in Comparison with Central European Results (Prodehl, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0105.pdf"〉MARS 66. Eine Magnetbandapparatur für seismische Tiefensondierung (Berckheimer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0109.pdf"〉Recordings with Askania Gravimeters Before and After Important Earthquakes (Kizawa, T.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0111.pdf"〉Ergänzung zu "In memoriam Otto Lucke" (Heft 6/1969, S. 6-8) (Fanselau, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN101433392X_0036/LOG_0112.pdf"〉[Werbung]〈/a〉〈/li〉 〈/ul〉
    Description: research
    Description: DFG, SUB Göttingen, DGG
    Keywords: 550 ; Geophysik ; Erdmagnetismus ; Geomagnetismus ; Geophysik ; Ionosphäre ; Ionosphere ; Seismik ; Seismology ; Strahlung ; Wellen ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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  • 11
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    Journal of Geophysics - Zeitschrift für Geophysik 40 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:40
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 134 Artikel zu Themengebieten der Seismologie, Erdmagnetismus und Gesteinsphysik veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1974.
    Description: Inhaltsverzeichnis: Journal of Geophysics 40 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0010.pdf"〉Seegravimetrie〈/a〉〈br〉 (Fleischer, U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0014.pdf"〉Statistical analysis of the pitch angle distribution of magnetospheric solar protons during geomagnetic activity〈/a〉〈br〉 (Scholer, M., Morfill, G., Hovestadt, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0016.pdf"〉Viscosity-depth-structure of different tectonic units and possible consequences for the upper part of converging plates〈/a〉〈br〉 (Meissner, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0017.pdf"〉Die Magnetisierung von Bohrkernen aus einem Serpentinit-Vorkommen bei Erbendorf (Oberpfalz) (Schult, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0018.pdf"〉Estimates of in situ thermal diffusivity of the Ore-Bearing Rocks in some drillholes in the Skellefte Field (N. Sweden) using the annual temperature wave〈/a〉〈br〉 (Parasnis, D. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0019.pdf"〉Geophysical exploration for groundwater in the Lusaka District, Republic of Zambia〈/a〉〈br〉 (Töpfer, K.D., Legg, C. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0021.pdf"〉Neuere Versuche zum Dipol-Induktionsverfahren〈/a〉〈br〉 (Leppin, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0022.pdf"〉A field evaluation of Caner's broad-band geomagnetic induction instrumentation〈/a〉〈br〉 (Dragert, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0025.pdf"〉Seismic noise at 2 Hz in Europe〈/a〉〈br〉 (Plešinger, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0026.pdf"〉Crustal structure under the Ionian Sea〈/a〉〈br〉 (Weigel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0028.pdf"〉Heat-Flow Measurements in Swiss Lakes〈/a〉〈br〉 (Von Herzen, R. P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0029.pdf"〉Makroseismische Abschätzungen von Herdparametern österreichischer Erdbeben aus den Jahren 1905 - 1973〈/a〉〈br〉 (Franke, A., Gutdeutsch, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0030.pdf"〉Long range propagation of seismic energy in the lower lithosphere〈/a〉〈br〉 (Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0033.pdf"〉Palaeomagnetism of tertiary volcanic rocks from the Ethiopian southern plateau and the Danakil Block〈/a〉〈br〉 (Schult, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0034.pdf"〉Calculation of the shape and position of the last closed field line boundary and the coordinates of the magnetopause neutral points in a theoretical magnetospheric field model〈/a〉〈br〉 (Voigt, G.-H.))〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0037.pdf"〉Doppler shift of auroral backscatter signals〈/a〉〈br〉 (Czechowsky, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0038.pdf"〉Spherical harmonic analysis of the DS-field during magnetic storms〈/a〉〈br〉 (Schreiber, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0041.pdf"〉Note on determining hourly mean values〈/a〉〈br〉 (Larsen, J. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0042.pdf"〉Seismic observations in Germany of a 10 t explosion off Scotland〈/a〉〈br〉 (Bonjer, K.-P., Kaminski, W., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0044.pdf"〉A method to reduce the measuring time for spinner magnetometers〈/a〉〈br〉 (Hummervoll, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0045.pdf"〉Book Reviews〈/a〉〈br〉 (Mayer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0046.pdf"〉Transverse plasma waves in the solar wind close to the proton gyrofrequency〈/a〉〈br〉 (Rehn, H. W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0047.pdf"〉Die magnetische Anomalie der Ivreazone〈/a〉〈br〉 (Albert, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0052.pdf"〉Second meeting of the European Geophysical Society〈/a〉〈br〉〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0053.pdf"〉On a high-frequency method for the measurement of susceptibilities and hysteresis losses of rocks and minerals between nitrogen temperature and 700 °C〈/a〉〈br〉 (Markert, H., Trissl, K.-H., Zimmermann, G. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0054.pdf"〉Kinetics of oxidation processes in titanomagnetites〈/a〉〈br〉 (Kropáček, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0056.pdf"〉Ultra sound absorption measurements in rock samples at low temperatures〈/a〉〈br〉 (Herminghaus, Ch., Berckhemer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0058.pdf"〉Recordings with the Askania borehole tiltmeter (vertical pendulum) in the frequency range of earth's free oscillations〈/a〉〈br〉 (Flach, D., Große-Brauckmann, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0060.pdf"〉Heat flow measurements in northern Italy and heat flow maps of Europe〈/a〉〈br〉 (Haenel, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0062.pdf"〉Die Bestimmung der Transmissivität von Grundwasserleitern aus dem Einschwingverhalten des Brunnen-Grundwasserleitersystems〈/a〉〈br〉 (Krauss, I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0063.pdf"〉Symposium on "Geomagnetic Anomalies, Rock Magnetism and Petrography"〈/a〉〈br〉 (Hahn, A., Hall, D. H., Dunlop, D. J., Kobayashi, Kazuo, Nomura, Masafumi, Lidiak, E. G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0090.pdf"〉The AEROS mission〈/a〉〈br〉 (Lämmerzahl, P., Bauer, S. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0091.pdf"〉The AEROS-EUV Spectrometer〈/a〉〈br〉 (Schmidtke, G., Schweizer, W., Knothe, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0092.pdf"〉The retarding potential analyzer on AEROS-B〈/a〉〈br〉 (Spenner, K., Dumbs, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0094.pdf"〉Impedance probe. The AEROS-B electron density experiment〈/a〉〈br〉 (Neske, E., Kist, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0095.pdf"〉The AEROS neutral and ion mass-spectrometer〈/a〉〈br〉 (Krankowsky, D., Lämmerzahl, P., Bonner, F., Wieder, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0096.pdf"〉The neural atmosphere temperature experiment〈/a〉〈br〉 (Spencer, N. W., Pelz, D. T., Niemann, H. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0097.pdf"〉Atmospheric drag analysis with the AEROS Satellite〈/a〉〈br〉 (Roemer, Max, Wulf-Mathies, Carsten)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0098.pdf"〉Electromagnetic reflections in salt deposits〈/a〉〈br〉 (Thierbach, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0100.pdf"〉The structure of the Ries crater from geoelectric depth soundings〈/a〉〈br〉 (Ernstson, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0102.pdf"〉Measurements of magnetic total field anomalies in the Hon Graben, Libya〈/a〉〈br〉 (Schult, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0103.pdf"〉Correction〈/a〉〈br〉〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0104.pdf"〉Book reviews〈/a〉〈br〉 (Theile, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0105.pdf"〉Interplanetary magnetic fields and the propagation of cosmic rays〈/a〉〈br〉 (Wibberenz, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0106.pdf"〉Intensity and energy spectrum of electrons accelerated in the earth's bow shock〈/a〉〈br〉 (Anderson, K. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0107.pdf"〉Evidence from particle precipitation of two-way-convection in auroral latitudes〈/a〉〈br〉 (Hultqvist, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0110.pdf"〉Investigation of electron dynamics in the magnetosphere with electron beams injected from sounding rockets〈/a〉〈br〉 (Winckler, J. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0113.pdf"〉Cosmic ray electrons in the atmosphere〈/a〉〈br〉 (Fulks, G., Meyer, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0114.pdf"〉Cosmic rays underground and the interplanetary magnetic field〈/a〉〈br〉 (Regener, Victor H., Regener, Eric)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0115.pdf"〉Harmonic temperature waves in a horizontally layered medium〈/a〉〈br〉 (Mundry, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0118.pdf"〉No transform faults on the moon〈/a〉〈br〉 (Stegena, L., Bérczi, Sz.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0121.pdf"〉Dominating trends of the anomalies of the gravity and magnetic fields in NE France and SW Germany〈/a〉〈br〉 (Edel, J. B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0040/LOG_0122.pdf"〉Book Reviews〈/a〉〈br〉 (Strobach, K., Petersen, Nikolai)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DGG, DFG, SUB Göttingen
    Keywords: 550 ; Aeronomy ; AEROS (satellite) ; Africa ; Alps ; Applied Geophysics ; Aurora ; Austria ; Bow Shock of Earth ; Canada ; Cosmic Rays ; Crustal Structure ; Earthquakes ; Europe ; France ; Free Oscillation of Earth ; Geoelectrics ; Geomagnetic Anomalies ; Geomagnetic Deep Sounding ; Geomagnetic Secular Variation ; Geomagnetic Time Variations ; Gravity Anomalies ; Gravity ; Geothermics ; Germany ; Great Britain ; Heat Flow ; Hydrology ; Interplanetary Magnetic Field ; Ionian Sea ; Ionosphere ; Italy ; Lunar Seismology ; Lunar Tectonism ; Macquarie-Inseln ; Magnetosphere ; Mantle of Earth ; Marine Geophysics ; Pacific Ocean ; Paleomagnetism ; Particle Acceleration ; Plasma Waves ; Radio Waves ; Ries Crater ; Rock Magnetism ; Rock Physics ; Salt Deposits ; Seismic Deep Sounding ; Seismic Noise ; Seismic Refraction Measurements ; Seismic Wave Absorption ; Seismology ; Solar EUV Radiation ; Solar Wind ; Switzerland ; Tectonophysics ; Tiltmeter ; United States ; USSR ; Viscosity of Earth ; FID-GEO-DE-7
    Language: German , English
    Type: anthology_digi
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    Journal of Geophysics - Zeitschrift für Geophysik 51 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:51
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 29 Artikel zu Themengebieten der Geophysik, insbesondere zu Aspekten des Erdmagnetismus und der Seismik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1982.
    Description: Inhaltsverzeichnis: Journal of Geophysics 51 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0011.pdf"〉〈sup〉40〈/sup)Ar–〈sup〉39〈/sup〉Ar Ages of Rocks and Glasses from the Nördlinger Ries Crater and the Temperature History of Impact Breccias〈/a〉〈br〉 (Staudacher, T., Jessberger, E. K., Dominik, B., Kirsten, T., Schaeffer, O. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0012.pdf"〉Tectonic Inferences of Paleomagnetic Data from Some Mesozoic Formations in Central Iran〈/a〉〈br〉 (Wensink, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0013.pdf"〉Palaeomagnetic Results from Lower Paleozoic Diabases and Pillow Lavas from the Frankenwald Area (Northwestern Edge of the Bohemian Massif) 〈/a〉〈br〉 (Kim, In-Soo, Soffel, H. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0014.pdf"〉Palaeomagnetism of Quaternary Volcanics of the East-Eifel, Germany〈/a〉〈br〉 (Böhnel, H., Kohnen, H., Negendank, J., Schmincke, H.-U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0016.pdf"〉The Effect of Young Oceanic Regions on Frequencies and Damping of free Oscillations of the Earth〈/a〉〈br〉 (Roult, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0017.pdf"〉Altitude Characteristics of Radar Aurora as Seen by a 90-MHz Double-Altitude Radar System Operated at Karmaselga, Karelia〈/a〉〈br〉 (Timofeev, E., Miroshnikov, Y.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0018.pdf"〉Observations of Ionospheric and Field-Aligned Currents in the Late Afternoon Sector with Triad and the Scandinavian Magnetometer Array〈/a〉〈br〉 (Sulzbacher, H., Baumjohann, W., Potemra, T. A., Nielsen, E., Gustafsson, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0019.pdf"〉Adiabatic Invariant of the Non-Relativistic Particles in the Field of a Shock Wave〈/a〉〈br〉 (Chirkov, A. G., Khodjaev, S. D., Shatalov, S. D., Vasiliyev, V. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0020.pdf"〉Comparative Interpretation of Explosion Seismic Data〈/a〉〈br〉 (Ansorge, J., Prodehl, C., Bamford, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0022.pdf"〉The Intercept-Time Method – Possibilities and Limitations〈/a〉〈br〉 (Pavlenkova, N. I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0025.pdf"〉Linearized Solutions of Kinematic Problems of Seismic Body Waves in Inhomogeneous Slightly Anisotropic Media〈/a〉〈br〉 (Červený, V., Jech, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0026.pdf"〉Source Parameters of Mine Tremors in the Eastern Part of the Ruhr-District (West-Germany) 〈/a〉〈br〉 (Hinzen, K.-G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0027.pdf"〉Ferromagnetic Resonance 〈I〉g〈/i〉-Factor Measurement on LUNA 20 Soil〈/a〉〈br〉 (Frait, Z., Cimbálníková, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0028.pdf"〉Observation of Guided ULF-Waves Correlated with Auroral Particle Precipitation Theoretically Explained by Negative Landau Damping〈/a〉〈br〉 (Klöcker, N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0029.pdf"〉Ground – Satellite Correlative Study of a Giant Pulsation Event〈/a〉〈br〉 (Hillebrand, O., Münch, J., McPherron, R. L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0030.pdf"〉Average Diurnal Variations of the Intensity of Geomagnetic Pulsations in the Period Ranges of pc 2–pc 5 Observed at Fürstenfeldbruck During the Years 1960–1971〈/a〉〈br〉 (Korschunow, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0031.pdf"〉Dispersion Effect in Earth Tide Parameters? 〈/a〉〈br〉 (Wilhelm, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0032.pdf"〉Comments on “Palaeomagnetism of Upper Cretaceous Volcanics and Nubian Sandstones of Wadi Natash, SE Egypt and Implications for the Polar Wander Path for Africa in the Mesozoic”〈/a〉〈br〉 (Schult, A., Hussain, A. G., Soffel, H. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0033.pdf"〉Book Reviews〈/a〉〈br〉 (Buntebarth, G., Stegena, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0034.pdf"〉Amplitude study of the 〈i〉Pg〈/i〉 Phase〈/a〉〈br〉 (Banda, E., Deichmann, N., Braile, L. W., Ansorge, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0035.pdf"〉Analysis of Broad-Band Rayleigh Waves: A Possibility for Seismic Discrimination〈/a〉〈br〉 (Hanka, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0038.pdf"〉Shear Fracture Development and Seismic Regime in Pyrophyllite Specimens with Soft Inclusions〈/a〉〈br〉 (Sobolev, G., Rummel, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0039.pdf"〉The Shape of the Geomagnetic Field Through the Last 8,500 Years Over Part of the Northern Hemisphere〈/a〉〈br〉 (Creer, K. M., Tucholka, P.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0040.pdf"〉The Induced Effects of Geomagnetic Variations in the Equatorial Region〈/a〉〈br〉 (Carlo, L., Singh, B. P., Rastogi, R. G., Agrarwal, A. K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0041.pdf"〉Parameter Trade-Off in One-Dimensional Magnetotelluric Modelling〈/a〉〈br〉 (Fischer, G., Le Quang, B. V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0042.pdf"〉A Theory of Forced Magnetohydrodynamic Waves〈/a〉〈br〉 (Krummheuer, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0043.pdf"〉Pi2 Magnetic Pulsations, Auroral Break-ups, and the Substorm Current Wedge: A Case Study〈/a〉〈br〉 (Pashin, A. B., Glaßmeier, K. H., Baumjohann, W., Raspopov, O. M., Yahnin, A. G., Opgenoorth, H. J., Pellinen, R. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0045.pdf"〉In Memoriam Haakon Brækken 14 April 1902 – 2 Juli 1982〈/a〉〈br〉 (Saxov, S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0051/LOG_0046.pdf"〉Book Reviews〈/a〉〈br〉 (Jacoby, W. R., Jentzsch, G., Spohn, T., Engelhard, L., Christensen, U.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aurora ; Geomagnetic Pulsations ; Paleomagnetism ; Paläomagnetismus ; Satellites ; Seismologie ; Seismology ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 13
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    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 52 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:52
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 33 Artikel zu Themengebieten der Geophysik, inklusive der Beiträge zu einem Symposium über "Plasma und Teilchen in der Magnetosphäre", veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1983.
    Description: Inhaltsverzeichnis: Journal of Geophysics 52 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0011.pdf"〉On Systematic Errors in Phase-Velocity Analysis〈/a〉〈br〉 (Wielandt, E., Schenk, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0012.pdf"〉The Upper Mantle Structure Under South-East Europe Derived from GRF Broadband Records of Greek Earthquakes〈/a〉〈br〉 (Rademacher, H, Odom, R. I., Kind, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0013.pdf"〉Seismic Velocities of Granulites from the Seiland Petrographic Province, N. Norway: Implications for Scandinavian Lower Continental Crust〈/a〉〈br〉 (Chroston, P. N., Evans, C. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0014.pdf"〉Inductive Coupling Between Idealized Conductors and Its Significance for the Geomagnetic Coast Effect〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0015.pdf"〉VHF Radar Observations of Wind Velocities at the Arecibo Observatory〈/a〉〈br〉 (Röttger, J., Czechowsky, P., Rüster, R., Schmidt, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0016.pdf"〉Spatial Variations of Ionospheric Conductivity and Radar Auroral Amplitude in the Eastward Electrojet Region During Pre-Substorm Conditions〈/a〉〈br〉 (Uspensky, M. V., Pellinen, R. J., Baumjohann, W., Starkov, G. V., Nielsen, E., Sofko, G., Kaila, K. U.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0019.pdf"〉On the Dependence of Radar Aurora Amplitude on Ionospheric Electron Density〈/a〉〈br〉 (Starkov, G. V., Oksman, J., Uspensky, M. V., Kustov, A. V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0020.pdf"〉A Possibility to Distinguish Between Ionospheric and Magnetospheric Origin of Low Latitude Magnetic Perturbations〈/a〉〈br〉 (Papamastorakis, I., Haerendel, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0021.pdf"〉An Analogue Model of the Geomagnetic Induction in the South Indian Ocean〈/a〉〈br〉 (Papamastorakis, I., Haerendel, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0022.pdf"〉Book Review〈/a〉〈br〉 (Klever, N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0023.pdf"〉Investigations of the Internal Geomagnetic Field by Means of a Global Model of the Earth's Crust〈/a〉〈br〉 (Meyer, J., Hufen, J.-H., Sichert, M., Hahn, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0025.pdf"〉A Palaeointensity Method for Use with Highly Oxidised Basalts, and Application to Some Permian Volcanics〈/a〉〈br〉 (Senanayake, W. E., McElhinny, M. W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0027.pdf"〉Comparison of Errors in Local and Reference Estimates of the Magnetotelluric Impedance Tensor〈/a〉〈br〉 (Kröger, P., Micheel, H. J., Elsner, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0028.pdf"〉Discrete Chorus Emissions Recorded at Nainital〈/a〉〈br〉 (Khosa, P. N., Lalmani, Ahmad, M. M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0029.pdf"〉Evidence for Lamination in the Lower Continental Crust Beneath the Black Forest〈/a〉〈br〉 (Southwestern Germany) (Deichmann, N., Ansorge, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0030.pdf"〉FENNOLORA Recordings at NORSAR〈/a〉〈br〉 (Mereu, R. F., Mykkeltveit, S., Husebye, E. S.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0032.pdf"〉Earth's Flattening Effect on the Tidal Forcing Field〈/a〉〈br〉 (Wilhelm, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0033.pdf"〉Some Results of Calibration Factor Determination of LaCoste and Romberg Gravity Meters (Model D) 〈/a〉〈br〉 (Götze, H.-J., Meurers, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0034.pdf"〉Ocean Tides and Periodic Variations of the Earth's Rotation〈/a〉〈br〉 (Baader, H.-R., Brosche, P., Hövel, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0035.pdf"〉In Memoriam Anton Graf (1901–1981) 〈/a〉〈br〉 (Rosenbach, O., Gauthier, W.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0036.pdf"〉In Memoriam Jürgen Henning Illies March 14, 1924 – August 2, 1982〈/a〉〈br〉 (Fuchs, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0037.pdf"〉Book Reviews〈/a〉〈br〉 (Spohn, T., Jacoby, W. R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0038.pdf"〉Preface to the special issue “Plasma and Energetic Particles in the Magnetosphere”, EGS Meeting, 23-27 Auguts 1982, Leeds, UK〈/a〉〈br〉 (Hovestadt, D., Untiedt, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0039.pdf"〉Global Pattern of Auroral Ion Precipitation: A Review of the Results from the AUREOLE-1 and AUREOLE-2 Satellites〈/a〉〈br〉 (Crasnier, J., Sauvaud, J. A., Cambou, F., Gladyshev, V. A., Kovrazhkin, R. A., Galperin, Yu. I.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0040.pdf"〉A Technique for Studying Density Gradients and Motions of Plasmaspheric Irregularities〈/a〉〈br〉 (Jones, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0041.pdf"〉Heavy Ion Plasmas in the Outer Magnetosphere〈/a〉〈br〉 (Young, D. T.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0042.pdf"〉Energetic Particle Signatures Near Magnetospheric Boundaries〈/a〉〈br〉 (Scholer, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0043.pdf"〉Recent ISEE Observations of the Magnetopause and Low Latitude Boundary Layer: A Review〈/a〉〈br〉 (Saunders, M. A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0044.pdf"〉Motion of Flux Transfer Events on 10 November 1977 Determined by Energetic Particles on ISEE 2〈/a〉〈br〉 (Daly, P. W., Keppler, E.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0045.pdf"〉On the Dynamics of the Ring Current〈/a〉〈br〉 (Hultqvist, B.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0046.pdf"〉Ionic Composition of the Earth's Radiation Belts〈/a〉〈br〉 (Spjeldvik, W. N.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0047.pdf"〉Energy and Charge Distribution of Energetic Helium Ions in the Outer Radiation Belt of the Earth〈/a〉〈br〉 (Klecker, B., Hovestadt, D., Scholer, M., Gloeckler, G., Ipavich, F. M., Fan, C. Y.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0052/LOG_0049.pdf"〉High Energy Electrons at Altitudes 500 km Near the Equator〈/a〉〈br〉 (Just, L., Kudela, K., Gusev, A. A., Pugacheva, G. I.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aurora ; Black Forest ; Earth's Crust ; Geomagnetism ; India ; Magnetosphere ; Seismics ; Seismology ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    CITATION GEO-LEO
  • 14
    facet.materialart.
    Unknown
    Journal of Geophysics - Zeitschrift für Geophysik 56 (2019)
    Springer, Berlin
    In:  SUB Göttingen | 8 Z NAT 2148:56
    Details
    Publication Date: 2021-03-29
    Description: Dieser Band enthält 26 Artikel zu Themengebieten der Geophysik, veröffentlicht durch die Deutsche Geophysikalische Gesellschaft in dem Jahr 1985.
    Description: Inhaltsverzeichnis: Journal of Geophysics 56 〈html〉 〈body〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0010.pdf"〉Archaeomagnetic Study of Medieval Fireplaces at Mannheim-Wallstadt and Ovens from Herrenchiemsee (Southern Germany) and the Problem of Magnetic Refraction〈/a〉〈br〉 (Schurr, K., Becker, H., Soffel, H.C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0012.pdf"〉Frequency Dependence of 〈i〉Q〈/i〉 for Seismic Body Waves in the Earth's Mantle〈/a〉〈br〉 (Ulug, A., Berckhemer, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0013.pdf"〉The Polarization of S Waves in a Heterogeneous Isotropic Earth Model〈/a〉〈br〉 (Cormier, V. F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0014.pdf"〉The Relaxation of Spherical and Flat Maxwell Earth Models and Effects Due to the Presence of the Lithosphere〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0015.pdf"〉Plasma-Gas Interactions in Planetary Atmospheres and Their Relevance for the Terrestrial Hydrogen Budget〈/a〉〈br〉 (Nass, H. U., Fahr, H. J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0016.pdf"〉Increased Ionospheric Absorption Connected With Pc 1 Pulsations after Geomagnetic Storms〈/a〉〈br〉 (Märcz, F.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0017.pdf"〉Some Aspects of Whistler Duct Lifetimes at Low Latitudes〈/a〉〈br〉 (Lalmani)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0018.pdf"〉On a Mixed Quadratic Invariant of the Magnetic Susceptibility Tensor〈/a〉〈br〉 (Jelinek, V.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0019.pdf"〉In Memoriam Hans Closs (1907 – 1982) 〈/a〉〈br〉 (Dürbaum, H.-J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0020.pdf"〉In Memoriam Herbert Flathe (1919 – 1983) 〈/a〉〈br〉 (Homilius, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0021.pdf"〉Book Reviews〈/a〉〈br〉 (Böhmel, H., Doan, D., Strobach, K., Jentzsch, G.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0022.pdf"〉Crustal Structure Beneath the Swabian Jura, SW Germany, from Seismic Refraction Investigations〈/a〉〈br〉 (Gajewski, D., Prodehl, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0024.pdf"〉Static Deformations and Gravity Changes at the Earth's Surface Due to Atmospheric Loading〈/a〉〈br〉 (Rabbel, W., Zschau, J.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0026.pdf"〉The Normal Modes of a Uniform, Compressible Maxwell Half-Space〈/a〉〈br〉 (Wolf, D.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0027.pdf"〉Magnetic Expression of the Continent-Ocean Boundary Between the Western Margin of Australia and the Eastern Indian Ocean〈/a〉〈br〉 (Veevers, J. J., Tayton, J. W., Johnson, B. D., Hansen, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0031.pdf"〉Domain State of Ti-Rich Titanomagnetites Deduced from Domain Structure Observations and Susceptibility Measurements〈/a〉〈br〉 (Appel, E., Soffel, H. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0032.pdf"〉Large-Scale Studies of Pi-2's Associated with Auroral Breakups〈/a〉〈br〉 (Samson, J. C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0033.pdf"〉Book Reviews〈/a〉〈br〉 (Schröder,W., Engelhard, L.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0034.pdf"〉Source Orientation from Grid Test and Synthetic Seismograms and an Application to the Ibbenbüren Earthquake of July 1981〈/a〉〈br〉 (Hinzen, K.-G., Krummel, H.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0035.pdf"〉Active Seismic Layers and Crustal Structure in Some Italian Regions〈/a〉〈br〉 (Cassinis, R., Mazzoni, P., Ranzoni, A.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0037.pdf"〉Nonlinear Inversion of Local Seismic Travel Times for the Simultaneous Determination of the 3D-Velocity Structure and Hypocentres – Application to the Seismic Zone Vrancea〈/a〉〈br〉 (Koch, M.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0038.pdf"〉The Relationship Between the Magnetic Anisotropy and the 〈i〉c〈/i〉-Axis Fabric in a Massive Hematite Ore〈/a〉〈br〉 (Hrouda, F., Siemes, H., Herres, N., Hennig-Michaeli, C.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0040.pdf"〉The Inverse Scattering Problem for Reflection of Electromagnetic Dipole Radiation From Earth With Vertical Variation〈/a〉〈br〉 (Vidberg, H. J., Riska, D. O.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0041.pdf"〉The Method of Integral Equation in the Direct Current Resistivity Method and its Accuracy〈/a〉〈br〉 (Schulz, R.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0042.pdf"〉Stochastic Ion Acceleration by Coherent Electrostatic Waves〈/a〉〈br〉 (Varvoglis, H., Papadopoulos, K.)〈/a〉〈/li〉 〈li〉〈a href="https://gdz.sub.uni-goettingen.de/download/pdf/PPN1015067948_0056/LOG_0043.pdf"〉Book Reviews〈/a〉〈br〉 (Dieminger, W., Brüstle, W.)〈/a〉〈/li〉 〈/body〉 〈/html〉
    Description: research
    Description: DFG, SUB Göttingen
    Keywords: 550 ; Aurora ; Earthquakes ; Earth's Crust ; Earth's Mantle ; Geomagnetic Pulsations ; Rock Magnetism ; Seismology ; Seismograms ; FID-GEO-DE-7
    Language: English
    Type: anthology_digi
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    Consequences of Tidal Dissipation in a Putative Venusian Ocean (2019)
    In:  CASI
    Details
    Publication Date: 2019-05-25
    Description: The solar tide in an ancient Venusian ocean is simulated using a dedicated numerical tidal model. Simulations with varying ocean depth and rotational periods ranging from minus 243 to 64 sidereal Earth days are used to calculate the tidal dissipation rates and associated tidal torque. The results show that the tidal dissipation could have varied by more than 5 orders of magnitude, from 0.001 to 780 gigawatts (GW), depending on rotational period and ocean depth. The associated tidal torque is about 2 orders of magnitude below the present day Venusian atmospheric torque, and could change the Venusian daylength by up to 72 days per million years depending on rotation rate. Consequently, an ocean tide on ancient Venus could have had significant effects on the rotational history of the planet. These calculations have implications for the rotational periods of similarly close-in exoplanetary worlds and the location of the inner edge of the liquid water habitable zone.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN68852 , The Astrophysical Journal Letters (ISSN 2041-8205) (e-ISSN 2041-8213); 876; 2; L22
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    A Limited Habitable Zone for Complex Life (2019)
    In:  CASI
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    Publication Date: 2019-06-29
    Description: The habitable zone (HZ) is commonly defined as the range of distances from a host star within which liquid water, a key requirement for life, may exist on a planet's surface. Substantially more CO2 than present in Earth's modern atmosphere is required to maintain clement temperatures for most of the HZ, with several bars required at the outer edge. However, most complex aerobic life on Earth is limited by CO2 concentrations of just fractions of a bar. At the same time, most exoplanets in the traditional HZ reside in proximity to M dwarfs, which are more numerous than Sun-like G dwarfs but are predicted to promote greater abundances of gases that can be toxic in the atmospheres of orbiting planets, such as carbon monoxide (CO). Here we show that the HZ for complex aerobic life is likely limited relative to that for microbial life. We use a 1D radiative-convective climate and photochemical models to circumscribe a Habitable Zone for Complex Life (HZCL) based on known toxicity limits for a range of organisms as a proof of concept. We find that for CO2 tolerances of 0.01, 0.1, and 1 bar, the HZCL is only 21%, 32%, and 50% as wide as the conventional HZ for a Sun-like star, and that CO concentrations may limit some complex life throughout the entire HZ of the coolest M dwarfs. These results cast new light on the likely distribution of complex life in the universe and have important ramifications for the search for exoplanet biosignatures and technosignatures.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN70116 , The Astrophysical Journal (ISSN 0004-637X) (e-ISSN 1538-4357); 878; 1; 19
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    GRAIL-Identified Gravity Anomalies in Oceanus Procellarum: Insight into Subsurface Impact and Magmatic Structures on the Moon (2019)
    In:  Other Sources
    Details
    Publication Date: 2019-06-29
    Description: Four, quasi-circular, positive Bouguer gravity anomalies (PBGAs) that are similar in diameter (~90-190 km) and gravitational amplitude (〉 140 mGal contrast) are identified within the central Oceanus Procellarum region of the Moon. These spatially associated PBGAs are located south of Aristarchus Plateau, north of Flamsteed crater, and two are within the Marius Hills volcanic complex (north and south). Each is characterized by distinct surface geologic features suggestive of ancient impact craters and/or volcanic/plutonic activity. Here, we combine geologic analyses with forward modeling of high-resolution gravity data from the Gravity Recovery and Interior Laboratory (GRAIL) mission in order to constrain the subsurface structures that contribute to these four PBGAs. The GRAIL data presented here, at spherical harmonic degrees 6660, permit higher resolution analyses of these anomalies than previously reported, and reveal new information about subsurface structures. Specifically, we find that the amplitudes of the four PBGAs cannot be explained solely by mare-flooded craters, as suggested in previous work; an additional density contrast is required to explain the high-amplitude of the PBGAs. For Northern Flamsteed (190 km diameter), the additional density contrast may be provided by impact-related mantle uplift. If the local crust has a density ~2800 kg/cu.m, then ~7 km of uplift is required for this anomaly, although less uplift is required if the local crust has a lower mean density of ~2500 kg/cu.m. For the Northern and Southern Marius Hills anomalies, the additional density contrast is consistent with the presence of a crustal complex of vertical dikes that occupies up to ~50% of the regionally thin crust. The structure of Southern Aristarchus Plateau (90 km diameter), an anomaly with crater-related topographic structures, remains ambiguous. Based on the relatively small size of the anomaly, we do not favor mantle uplift; however, understanding mantle response in a region of especially thin crust needs to be better resolved. It is more likely that this anomaly is due to subsurface magmatic material given the abundance of volcanic material in the surrounding region. Overall, the four PBGAs analyzed here are important in understanding the impact and volcanic/plutonic history of the Moon, specifically in a region of thin crust and elevated temperatures characteristic of the Procellarum KREEP Terrane.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN69978 , Icarus (ISSN 0019-1035); 331; 192-208
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    A New Model of the Crustal Magnetic Field of Mars Using MGS and MAVEN (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-02
    Description: While devoid of an active magnetic dynamo field today, Mars possesses a remanent magnetic field that may reach several thousand nanoteslas locally. The exact origin and the events that have shaped the crustal magnetization remain largely enigmatic. Three magnetic field data sets from two spacecraft collected over 13 cumulative years have sampled the Martian magnetic field over a range of altitudes from 90 up to 6,000 km: (a) Mars Global Surveyor (MGS) magnetometer (19972006), (b) MGS Electron Reflectometer (19992006), and (c) Mars Atmosphere and Volatile EvolutioN (MAVEN) magnetometer (2014 to today). In this paper we combine these complementary data sets for the first time to build a new model of the Martian internal magnetic field. This new model improves upon previous ones in several aspects: comprehensive data coverage, refined data selection scheme, modified modeling scheme, discrete-to-continuous transformation of the model, and increased model resolution. The new model has a spatial resolution of 160 km at the surface, corresponding to spherical harmonic degree 134. It shows small scales and well-defined features, which can now be associated with geological signatures.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN70068 , Journal of Geophysical Research: Planets
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    The Refractive Index of Amorphous and Crystalline Water Ice in the UV-vis (2019)
    In:  Other Sources
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    Publication Date: 2019-05-18
    Description: Amorphous solid water (ASW) is found on icy dust grains in the interstellar medium (ISM), as well as on comets and other icy objects in the outer solar system. The optical properties of ASW are thus relevant for many astrophysical environments, but in the ultravioletvisible (UVvis), its refractive index is not well constrained. Here, we introduce a new method based on UVvis broadband interferometry to measure the wavelength dependent refractive index n() of amorphous water ice from 10 to 130 K, i.e., for different porosities, in the wavelength range of 210757 nm. We also present n() for crystalline water ice at 150 K, which allows us to compare our new method with literature data. Based on this, a method to calculate n(, ) as a function of wavelength and porosity is reported. This new approach carries much potential and is generally applicable to pure and mixed ice, both amorphous and crystalline. The astronomical and physicalchemical relevance and future potential of this work are discussed.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN68160 , The Astrophysical Journal (ISSN 0004-637X) (e-ISSN 1538-4357); 875; 2
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    The Distribution, Composition, and Particle Properties of Mars Mesospheric Aerosols: an Analysis of CRISM Visible/near-IR Limb Spectra with Context from Near-Coincident MCS and MARCI Observations (2019)
    In:  Other Sources
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    Publication Date: 2019-05-18
    Description: The Compact Reconnaissance Imaging Spectral Mapper (CRISM) onboard the Mars Reconnaissance Orbiter (MRO) obtains pole-to-pole observations (i.e., full MRO orbits) of vertical profiles for visible/near-IR spectra (=0.44.0 m), which are ideally suited to identifying the composition and particle sizes of Mars ice and dust aerosols over 50100 km altitudes in the Mars mesosphere. Within the coverage limitations of the CRISM limb data set, a distinct compositional dichotomy is found in Mars mesospheric ice aerosols. CO2 ice clouds appear during the aphelion period of Mars orbit (Solar Longitudes, Ls0160) at low latitudes (20S10N) over specific longitude regions (Meridiani, Valles Marineris) and at typical altitudes of 5575 km. Apart from faint water ice hazes below 55 km, mesospheric H2O ice clouds are primarily restricted to the perihelion orbital range (Ls160 350) at northern and southern mid-to-low latitudes with less apparent longitudinal dependences. Mars mesospheric CO2 clouds are presented in CRISM spectra with a surprisingly large range of particle sizes (cross section weighted radii, Reff=0.3 to 2.2 m). The smaller particle sizes (Reff 1 m) appear concentrated near the spatial (latitude and altitude) boundaries of their global occurrences. CRISM spectra of mesospheric CO2 clouds also show evidence of iridescence, indicating very narrow particle size distributions (effective variance, Veff0.03) and so very abrupt CO2 cloud nucleation. Furthermore, these clouds are sometimes accompanied by altitude coincident peaks in 1.27 m O2 dayglow, which indicates very dry, cold regions of formation. Mesospheric water ice clouds generally exhibit small particle sizes (Reff=0.10.3 m), although larger particle sizes (Reff=0.40.7 m) appear infrequently. On average, water ice cloud particle sizes decrease with altitude over 5080 km in the perihelion mesosphere. Water ice mass appears similar in clouds over a large range of observed cloud particle sizes, with particle number densities increasing to 10 cm3 for Reff=0.2 m. Near coincident Mars Climate Sounder (MCS) temperature and aerosol profile measurements for a subset of CRISM mesospheric aerosol measurements indicate near saturation (H2O and CO2) conditions for ice clouds and distinct mesospheric temperature increases associated with mesospheric dust loading. Dayside (3 pm) mesospheric CO2 clouds with larger particle sizes (Reff 0.5 m) scatter surface infrared emission in MCS limb infrared radiances, as well as solar irradiance in the MCS solar band channel. Scattering of surface infrared emission is most strikingly presented in nighttime (3 am) MCS observations at 5560 km altitudes, indicating extensive mesospheric nighttime CO2 clouds with considerably larger particle sizes (Reff7 m). Mesospheric CO2 ice clouds present cirrus-like waveforms over extensive latitude and longitude regions (1010), as revealed in coincident Mars Color Imager (MARCI) nadir imaging. Solar tides, gravity waves, and the large orbital variation of the extended thermal structure of the Mars atmosphere influence all of these behaviors. Mesospheric dust aerosols appear infrequently over the non-global (planet encircling) dust storm era of the CRISM limb data set (20092016), and exhibit smaller particle sizes (Reff=0.20.7 m) relative to dust in the lower atmosphere. One isolated case of an aphelion (Ls=96) mesospheric dust layer with large dust particle sizes (Reff 2 m) over Syria Planum may reflect high altitude, non-local transport of dust over elevated regions.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN68079 , Icarus (ISSN 0019-1035); 328; 246-273
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    Co-orbital Asteroids as the Source of Venus's Zodiacal Dust Ring (2019)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Photometry from the Helios and STEREO spacecraft revealed regions of enhanced sky surface-brightness suggesting a narrow circumsolar ring of dust associated with Venus's orbit. We model this phenomenon by integrating the orbits of 10,000,000+ dust particles subject to gravitational and non-gravitational forces, considering several different kinds of plausible dust sources. We find that only particles from a hypothetical population of Venus co-orbital asteroids can produce enough signal in a narrow ring to match the observations. Previous works had suggested such objects would be dynamically unstable. However, we re-examined the stability of asteroids in 1:1 resonance with Venus and found that ~8% should survive for the age of the solar system, enough to supply the observed ring.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN67865 , The Astrophysical Journal Letters,; 2; 873; L16
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    A 3 Gyr White Dwarf with Warm Dust Discovered via the Backyard Worlds: Planet 9 Citizen Science Project (2019)
    In:  Other Sources
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    Publication Date: 2019-06-27
    Description: Infrared excesses due to dusty disks have been observed orbiting white dwarfs with effective temperatures between 7200 and 25,000 K, suggesting that the rate of tidal disruption of minor bodies massive enough to create a coherent disk declines sharply beyond 1 Gyr after white dwarf formation. We report the discovery that the candidate white dwarf LSPM J0207+3331, via the Backyard Worlds: Planet 9 citizen science project and Keck Observatory follow-up spectroscopy, is hydrogen dominated with a luminous compact disk (L IR/L star = 14%) and an effective temperature nearly 1000 K cooler than any known white dwarf with an infrared excess. The discovery of this object places the latest time for large-scale tidal disruption events to occur at ~3 Gyr past the formation of the host white dwarf, making new demands of dynamical models for planetesimal perturbation and disruption around post-main-sequence planetary systems. Curiously, the mid-infrared photometry of the disk cannot be fully explained by a geometrically thin, optically thick dust disk as seen for other dusty white dwarfs, but requires a second ring of dust near the white dwarf's Roche radius. In the process of confirming this discovery, we found that careful measurements of WISE source positions can reveal when infrared excesses for white dwarfs are co-moving with their hosts, helping distinguish them from confusion noise.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN67863 , The Astrophysical Journal Letters; 2; 872; L25
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    Wrinkle Ridges on Mercury and the Moon Within and Outside of Mascons (2019)
    In:  Other Sources
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    Publication Date: 2019-06-26
    Description: Found on all terrestrial planets, wrinkle ridges are anticlines formed by thrust faulting and folding resulting from crustal shortening. The MErcury Surface, Space Environment, Geochemistry, and Ranging (MESSENGER) spacecraft's orbital phase returned high resolution images and topographic data of the previously unimaged northern high latitudes of Mercury where there are large expanses of smooth plains deformed by wrinkle ridges. Concurrently, the Lunar Reconnaissance Orbiter (LRO) is obtaining high resolution images and topographic data covering lunar mare wrinkle ridges. These data allow quantitative comparison of the scale of wrinkle ridges in smooth plains volcanic units on Mercury with mare wrinkle ridges. We evaluate the topographic relief of 300 wrinkle ridges within and outside of mascon basins on the Moon and Mercury. Measured wrinkle ridges range from ~112 to 776 m in relief with a mean of ~350 m (median = ~340 m, n = 150) on Mercury and from ~47 to 678 m in relief with a mean of ~198 m (median = ~168 m, n = 150) on the Moon. Wrinkle ridges on Mercury thus are approximately twice as large in mean relief compared to their counterparts on the Moon. The larger scale of Mercury's wrinkle ridges suggests that their formation can be attributed, in part, to global contraction. As global contraction on the Moon is estimated to be an order of magnitude smaller than on Mercury, the smaller scale of lunar wrinkle ridges suggests they most likely form primarily by load induced subsidence of the mare basalt. Wrinkle ridges located in lunar mascon basins and in the Caloris mascon on Mercury are not statistically significantly different in relief than ridges in non-mascon regions, suggesting comparable levels of contractional strain. The fact that mascon basins do not host wrinkle ridges with greater structural relief relative to non-mascon units may indicate the critical role lithospheric thickness plays in controlling subsidence and contraction of thick volcanic sequences on the Moon and Mercury.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN70101 , Icarus (e-ISSN 0019-1035); 331; 226-237
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    Mars Phoenix EDL Trajectory and Atmosphere Reconstruction Using NewSTEP (2019)
    In:  CASI
    Details
    Publication Date: 2019-06-20
    Description: This document describes the trajectory and atmosphere reconstruction of the Mars Phoenix Entry, Descent, and Landing using the New Statistical Trajectory Estimation Program. The approach utilizes a Kalman filter to blend inertial measurement unit data with initial conditions and radar altimetry to obtain the inertial trajectory of the entry vehicle. The nominal aerodynamic database is then used in combination with the sensed accelerations to obtain estimates of the atmosphere-relative state. The reconstructed atmosphere pro le is then blended with pre-flight models to construct an estimate of the as-flown atmosphere.
    Keywords: Lunar and Planetary Science and Exploration
    Type: NASA/TM–2019–220282 , L-21028 , NF1676L-33202
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    Lifetimes and Occurrence Rates of Dark Vortices on Neptune from 25 Years of Hubble Space Telescope Images (2019)
    In:  Other Sources
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    Publication Date: 2019-06-13
    Description: We scoured the full set of blue-wavelength Hubble Space Telescope images of Neptune, finding one additional dark spot in new Hubble data beyond those discovered in 1989, 1994, 1996, and 2015. We report the complete disappearance of the SDS-2015 dark spot, using new Hubble data taken on 2018 September 910, as part of the Outer Planet Atmospheres Legacy (OPAL) program. Overall, dark spots in the full Hubble data set have lifetimes of at least one to two years, and no more than six years. We modeled a set of dark spots randomly distributed in time over the latitude range on Neptune that is visible from Earth, finding that the cadence of archival Hubble images would have detected about 70% of these spots if their lifetimes are only one year, or about 85%95% of simulated spots with lifetimes of two or more years. Based on the Hubble data set, we conclude that dark spots have average occurrence rates of one dark spot every four to six years. Many numerical models to date have simulated much shorter vortex lifetimes, so our findings provide constraints that may lead to improved understanding of Neptunes wind field, stratification, and humidity.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN68800 , Astronomical Journal (ISSN 0004-6256) (e-ISSN 1538-3881); 157; 4; 152; April 2019
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    Cross-Program Design Specification for Natural Environments (DSNE) (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-25
    Description: This document is derived from the former National Aeronautics and Space Administration (NASA) Constellation Program (CxP) document CxP 70023, titled The Design Specification for Natural Environments (DSNE), Revision C. The original document has been modified to represent updated Design Reference Missions (DRMs) for the NASA Exploration Systems Development (ESD) Programs.
    Keywords: Lunar and Planetary Science and Exploration
    Type: SLS-SPEC-159 Revision F , M19-7505
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    Picture this SELFI: Submillimeter Enceladus Life Fundamentals Instrument (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The Submillimeter Enceladus Life Fundamentals Instrument (SELFI) is a passive remote sensing submillimeter heterodyne spectrometer being developed at NASA GSFC under NASA's Maturation of Instruments for Solar System Exploration (MatISSE) program. SELFI will advance submillimeter receiver technology by 1) investigating the chemical and isotopic compositions and corresponding densities of Enceladus' plume material, their vertical thermal structures, and the transport mechanisms within the plumes, and 2) characterizing the source regions from which the plumes emerge. The Enceladus plumes are important in the context of life and habitability of its subsurface ocean environment. SELFI remote sensing measurements will 1) measure the spatial and temporal variabilities in the plume chemical compositions, 2) provide insight in to Enceladus' subsurface ocean environment by monitoring H2O, HDO, d18O, and d17O, 3) constrain the oxidation state of the subsurface ocean using H2O2 and O3, and 4) utilize the SO2 and H2S spectral signatures to constrain the impact arising from both the sea-floor volcanoes and pre-biotic molecules. Moreover, the detection of the remaining molecular species (14 in total) is vital to improving the current state of knowledge of Enceladus' subsurface ocean habitability this also permits us to explore the chemical alteration processes arising from primordial volatiles that have been observed in comets. Lastly, SELFI's continuum observations enable the correlation between observed variations in plume activity with surface temperatures.SELFI is currently being developed under a technology maturation program that will advance the RF-to-digital electronics of a submillimeter-wave heterodyne spectrometer to simultaneously observe fourteen molecular species with resonances between 530 GHz and 600 GHz. SELFI will have fine radiometric resolution, high spectral resolution (resolving power R 〉 106), multiple continuum channels and a high dynamical range, necessary to map Enceladus across its 30 K to 250 K temperature range. Under the MatISSE program, SELFI will advance from TRL 4 to 6 four key technologies of the RF-to-digital subsystem, which are: 1) the RF low noise amplifier design; 2) the single-sideband (SSB) mixer and local oscillator; 3) the IF assembly down-converter that maps the fourteen species to 2 x 500 MHz bandwidth; and 4) the digital spectrometer electronics.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN64627 , National Radio Science Meeting (NRSM); Jan 09, 2019 - Jan 12, 2019; Boulder, CO; United States
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    The Mars Global Dust Storm of 2018 (2019)
    In:  CASI
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    Publication Date: 2019-07-17
    Description: Mars is a dusty planet. Wind often lifts dust from the surface into the air forming clouds of dust at different locations across Mars. These dust storms typically last up to a couple days and grow to a few hundred km in size. However, once in a long while when conditions are just right, localized dust storms can interact in a way that optically thick suspended dust covers nearly the entire planet remaining aloft for weeks to months. These global-scale dust storms are the most dramatic of all weather phenomena on Mars, greatly altering the thermal structure and dynamics of the Martian atmosphere and significantly changing the global distribution of surface dust. Such a global-scale dust storm occurred during the summer of 2018, the first such event since 2007. The global dust storm was observed by an international fleet of spacecraft in Mars orbit and on the surface of Mars providing an unprecedented view of the initiation, growth, and decay of the storm as well as the physical properties of the dust during the storm's evolution. The 2018 global-scale dust storm was observed to grow from several localized dust-lifting centers with wind-blown dust suspended in the atmosphere encircling Mars after about two weeks of activity. Dust column optical depths recorded by the Opportunity and Curiosity rovers on the surface were the highest ever recorded on Mars. Peak global intensity of the dust storm was reached in early July 2018. Over the next couple months, the dust settled out and the atmosphere returned to its climatological average. Only a small number of global-scale dust storms have been observed on Mars, and so detailed analysis of the observations of this storm will provide important new insight into how these events occur and their effect on the current Mars climate.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN69947 , International Conference on Environmental Systems; Jul 07, 2019 - Jul 11, 2019; Boston, MA; United States
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    3d Crystallographic Orientation of Olivine in Bjurble Chondrules (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-17
    Description: The crystallographic orientations of chondrule minerals can provide important insights into their formation and deformational history. For example, the orientations of the olivine bars and surrounding rim in barred olivine chondrules provide information and on the conditions of crystallization and the orientations and shapes of olivines within porphritic chondrules can record the reactions with the surrounding nebular gas during chondrule formation. Later deformation on the parent body can cause crystal-plastic deformation of chondrule minerals that is evident through their intracrystalline lattice misorientations. Typically these crystal orientations and lattice misorientations are determined using electron backscatter diffraction (EBSD) on thin sections but this gives only a 2D picture for what is actually a 3D texture. While it is possible to combine EBSD with serial sectioning to build a 3D dataset of texture, this is a destructive, time-intensive process. A recent technological development that enables non-destructive, 3D crystallographic orientation measurement is X-ray diffraction contrast tomography (DCT), which uses the X-ray diffraction of the crystal lattice to determine orientation. Originally only possible using monochromatic X-ray beams at 3rd generation synchrotron light sources, DCT has been recently adapted to polychromatic sources of laboratory X-ray microscopes (referred to as Lab-DCT). Up to this point LabDCT has only been applied to large, well-formed crystals of high symmetry (i.e., metals), but we recently acquired DCT datasets for a pair Bjurble chondrules to determine the applicability of the technique to natural, mutlimineralic samples composed predominately of olivine (i.e., chondrules).
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN68323 , Annual Meeting of the Meteoritical Society; Jul 07, 2019 - Jul 12, 2019; Sapporo; Japan
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    Future Planetary Instrument Capabilities Made Possible by Micro- and Nanotechnology (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: A number of new instrument capabilities are currently in maturation for future in situ use on planetary science missions. Moving beyond the impressive in situ instrumentation already operating in planetary environments beyond Earth will enable the next step in scientific discovery. The approach for developing beyond current instrumentation requires a careful assessment of science-driven capability advancement. To this end, two examples of instrument technology development efforts that are leading to new and important analytical capabilities for in situ planetary science will be discussed: (1) an instrument prototype enabling the interface between liquid separation techniques and laser desorption/ionization mass spectrometry and (2) an addressable excitation source enabling miniaturized electron probe microanalysis for elemental mapping of light and heavy elements.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN67623 , SPIE Defense + Commercial Sensing; Apr 14, 2019 - Apr 18, 2019; Baltimore, MD; United States
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    Aqueous Alteration on Mars (2019)
    In:  CASI
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    Publication Date: 2019-07-20
    Description: The occurrence of extensive valley networks and layered deposits of phyllosilicates and sulfates during the late Noachian/Hesperian periods (approx. 3-4 Gyrs) indicates a past martian climate that was capable of maintaining liquid water at the surface. The planets climate drastically changed after these early episodes of water to a drier and colder environment during the Amazonian period (past 3.0 Gyrs). The objective of this paper is to describe aqueous alteration/weathering scenarios on Mars based on observations returned by rover and lander missions. The chemistry of most outcrops, rocks, and soils that have interacted with water has not been extensively changed from average Mars crustal basaltic composition. Little chemical variation suggests closed hydrologic systems were prominent on early Mars and/or the water/rock ratios were low. Open hydrologic systems occur at local scales, e.g., high Si and Ti rocks and soil deposits around a volcanic feature in Gusev crater. Geochemical and mineralogical indicators for aqueous alteration include jarosite and other Fe-sulfates at several locations suggesting acid-sulfate alteration conditions. High Si and Ti rocks, sediments, and soil deposits are consistent with basaltic residues extenively leached by extremely acidic fluids. Variations in the Fe/Mn ratio of fracture veins infilled with sulfate-rich materials suggest changes in redox and/or pH conditions of the migrating fluids. The increase of nanophase iron oxides and salts with depth in several soil pits escavated by the Spirit rovers wheel in Gusev crater suggests the translocation/mobolization of these phases by liquid water. This pedogenic process is the result of limited water movement through the surface sediments during the Amazonian period; however, it is likely that paleosols exist on Mars that formed during the early wetter history of the planet. Soil scientists have the opportunity to continue to (and should) be involved in the exploration of the Red planet.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN63042 , 2018-2019 International Soils Meeting; Jan 06, 2019 - Jan 09, 2019; San Deigo, CA; United States
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    Mercury's Internal Structure (2019)
    In:  CASI
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    Publication Date: 2019-07-20
    Description: We describe the current state of knowledge about Mercury's interior structure. We review the available observationalconstraints, including mass, size, density, gravity eld, spin state, composition, and tidal response. These data enablethe construction of models that represent the distribution of mass inside Mercury. In particular, we infer radial prolesof the pressure, density, and gravity in the core, mantle, and crust. We also examine Mercury's rotational dynamicsand the inuence of an inner core on the spin state and the determination of the moment of inertia. Finally, we discussthe wide-ranging implications of Mercury's internal structure on its thermal evolution, surface geology, capture in aunique spin-orbit resonance, and magnetic eld generation.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN67157 , Mercury: The View after MESSENGER; 85-113
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    Estimation of the Seismic Moment Release Rate of Mars from InSight Seismic Data (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Seismicity models for Mars usually estimate the long-term average annual seismic moment rate, and also the average annual event rate. This holds for estimations based on geological evidence (Golombek et al., 1992, Golombek, 2002, Taylor et al., 2013) as well as for models based on thermal evolution and cooling of the Martian interior (Phillips, 1991, Knapmeyer et al., 2006, Plesa et al., 2018). All studies are compatible with the conclusion based on the non-observation of any unambiguous event by Viking (Anderson et al., 1977, Goins & Lazarewicz, 1979) that Martian seismicity lies somewhere between that of the Moon and that of the Earth. We developed tools to derive reasonable estimations of the annual seismic moment rate from a number of events as small as one, provided that the observed events are beyond the global completeness threshold for observable events. Numerical tests as well as evaluation of terrestrial data shows the feasibility of the approach.
    Keywords: Lunar and Planetary Science and Exploration
    Type: MSFC-E-DAA-TN67424 , European Geosciences Union (EGU) General Assembly 2019; Apr 07, 2019 - Apr 12, 2019; Vienna; Austria
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    Fifty Years of Exploring Pluto: from Telescopes to the New Horizons Mission (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Pluto was discovered in 1930 at Lowell Observatory in the belated resumption of a wide-field photographic search originally be-gun at Percival Lowells direction prior to his death in 1916. Photometry in the 1950s established the rotation period of 6.4 hours and a color redder than the Sun, but the mass, density, size and albedo were unknown. Near-infrared photometry in 1976 indicated the presence of CH4 frost, suggestive of a relatively high surface albedo and a diameter comparable to the Moon. The large satellite Charon was discovered in 1978, followed by an epoch of mutual transits and occultations of Pluto and Charon from 1985 to 1990, as viewed from Earth. These events resulted in reliable sizes and masses of the two bodies, as well as the orbit of Charon. The mutual events also demonstrated that Pluto and Charon are in locked synchronous rotation and revolution, a configuration unique among the planets. The atmosphere of Pluto was discovered in 1988 from a stellar occultation observed from the Kuiper Airborne Observatory and ground stations, with indications of a haze layer (or a temperature inversion) in the lower atmosphere. Sub-sequent stellar occultations showed that the extent of the atmosphere is variable on a timescale of a few years. The spectroscopic detection of N2 and CO ice in 1993 demonstrated that the atmosphere must be primarily composed of N2, with CH4 and CO as minor components; the spectroscopic detection of gaseous CH4 was reported in 1994.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN65560 , Lunar and Planetary Science Conference (LPSC); Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    Experimental Insights into the Geochemistry of Mercury (2019)
    In:  CASI
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    Publication Date: 2019-07-20
    Description: With the recent estimate of Mercury's surface composition from the X-Ray Spectrometer and Gamma-Ray Spectrometer that were onboard NASA's MErcury Surface, Space ENvironment, Geochemistry and Ranging (MESSENGER) spacecraft, we now have our first opportunity to directly investigate the compositions of lavas from the planet Mercury and indirectly investigate the chemical make-up of its interior. Results from MESSENGER showed exotic surface compositions with more than 3 wt% sulfur in some lavas and relatively low amounts of iron (less than 3 wt%) across the surface. These striking features are consistent with magmatism occurring under highly reducing conditions which has an impact on the thermal and chemical evolution of a planetary body. Here we'll explore the geochemical evolution of Mercury through a series of experimental studies and discuss the implications of low oxygen fugacity on elemental behavior and magmatic processes.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN65232 , American Chemical Society National Meeting and Expo; Mar 31, 2019 - Apr 04, 2019; Orlando, FL; United States
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    Returning Geological Samples from Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Mars Ascent Vehicle (MAV) Study: Design challenges associated with Mars; Remote; Temperature; Atmosphere; Radiation; Dust. Challenges unique to MAV: No vehicle has ever left the surface of Mars; Completely autonomous; Physical system extremely limited; Martian environment creates a number of issues with traditional propulsion systems.
    Keywords: Lunar and Planetary Science and Exploration
    Type: M19-7197 , IEEE Aerospace Conference (AeroConf 2019); 2ý9 Mar. 2019; Big Sky, MT; United States
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    Radiation Stability Evaluation of Protein-Based Nanopores for Mars and Europa Missions (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Exploration of our Solar System has revealed a number of locations that are now habitable or could have supported life in the past. One approach to finding life involves detection of informational polymers like deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) that are definitive biosignatures for life as we know it. Alternatively, structural variants of DNA and RNA, collectively termed xenonucleic acids (XNAs) have been shown in the laboratory to behave similarly. Nanopore-based sequencers differ from traditional sequencing technologies in that they do not explicitly require synthesis of DNA before or during analysis. Because of this, nanopore sequencers have been used for the direct sequencing of RNA, and could be used for the detection and analysis of other charged polymers. Here we describe results of exposing the MinION hardware, flow cells, and key reagents to ionizing radiation at doses relevant to Mars and Europa missions (10 to 3000 silicon-equivalent gray).
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66686
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    NASA's Work in Exoplanet Hunting Satellites and Robotic Servicing of Satellites (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: An overview of three missions connected with NASA's Goddard Space Flight Center at the present time: (1) NASA's flagship mission, the James Webb Space Telescope, is nearing its 2021 launch date. The James Webb, which is considered the successor to the Hubble Space Telescope, will orbit at the Earth-Sun Lagrangian Point Two where it will peer back in time, using infrared detectors, to the beginnings of our Universe. (2) NASA is conducting pioneering work in the field of robotic satellite servicing in earth orbit. The RESTORE-L project, which is slated for a 2021 launch date, is expected to pave the way for the inception of robotic assembly for deep space exploration as well as the commercialization of satellite servicing. (3) The Transiting Exoplanet Survey Satellite (TESS) has been orbiting the Earth actively searching for new planets since April of 2018. The discoveries that TESS has made to-date have benefited from a careful characterization of the refractive lens assemblies on its science instruments. The presentation will provide a detailed description of how the index of refraction of the glasses used to fabricate the TESS lens assemblies were measured at Goddard to an accuracy that enables the ability to make exoplanet discoveries hundreds of light years from Earth.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN66421 , NASA''s Work in Exoplanet Hunting Satellites and Robotic Servicing of Satellites; Mar 27, 2019; Mont Claire, NJ; United States
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    In Situ Geochronology on Mars and the Development of Future Instrumentation (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Geochronology: More than just rock ages. What are the constraints on the time evolution ofthe dynamic solar system? When did the outerplanets migrate and the asteroid belt lose mass? How did it affect other bodies at that time?
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN67597 , EU-IN-TIME Rise Workshop on Geochronology and Mars Exploration; Apr 08, 2019 - Apr 12, 2019; Austin, TX; United States
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    Distribution of Surface Water Ice on the Moon: An Analysis of Host Crater Ages Provides Insight into the Ages and Sources of Ice at the Lunar South Pole (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN66763 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    In-Situ K-Ar Dating Based on UV-Laser Ablation Coupled with a LIBS-QMS System Development, Calibration and Application (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Absolute age determination isnecessary to check and calibratethe relative Martian chronologypresently available from meteoriticcrater counting.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN67097 , Lunar and Planetary Science Conference (LPSC); Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    Lynx: Simply Designed for Maximum Science Return (2019)
    In:  CASI
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    Publication Date: 2019-07-20
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: MSFC-E-DAA-TN67234 , The Space Astrophysics Landscape for the 2020s and Beyond; Apr 01, 2019 - Apr 03, 2019; Potomac, MD; United States
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    Lunar and Martian Vertical Takeoff & Vertical Landing (VTVL) Pad Concepts (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: Landing space craft rocket plume exhaust interactions with the regolith surfaces on the Moon and Mars will result in cratering and regolith particle ejecta traveling at velocities up to 2,000 meters per second in the vacuum surroundings. This phenomenon creates hazards for the spacecraft that is landing or launching and may also cause damage to surrounding assets, personnel and infrastructure. One potential solution to this issue is to construct vertical takeoff and vertical landing (VTVL) pad infrastructure systems which will mitigate these rocket plume exhaust effects. Concepts will be presented for the construction and maintenance of such VTVL pads in lunar and martian environments.
    Keywords: Lunar and Planetary Science and Exploration
    Type: KSC-E-DAA-TN65133 , Caltech Engineering Mechanics Institute Conference (EMI 2019); Jun 18, 2019 - Jun 21, 2019; Pasadena, CA; United States
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    Small-Array Location Capabilities Using the Seismometer to Investigate Ice and Ocean Structure (SIIOS): Implications for an Ocean World Lander (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Ocean worlds have thick icy shells covering subsurface oceans. Due to the potential habitability of the subsurface ocean, Europa has become a target for a potential lander mission. Seismology is the preeminent method for constraining the thickness of an icy shell. The Seismometer to Investigate Ice and Ocean Structure (SIIOS) uses flight-candidate instrumentation to develop approaches for seismic studies of icy bodies. The SIIOS team deployed small aperture seismic arrays on Gulkana Glacier in 2017 and in Northwest Greenland in 2018.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN66598 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    Investigating Diurnal Changes in the Normal Albedo of the Lunar Surface at 1064 nm: A New Analysis with the Lunar Orbiter Laser Altimeter (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The thermal environment of the lunar surface is extreme. At the equator, temperatures drop ~300 K between local noon and night. Laboratory studies demonstrate that minerals common to the lunar surface (e.g.,pyroxene, olivine) show spectral changes with respect to temperature in near infrared wavelengths. Over temperature changes equivalent to the lunar thermal environment (T 300K), the reflectance of pure pyroxene samples can vary by a factor of two.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN66761 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    A Glint of Light on Broken Glass: Solar System Bombardment History from Apollo Samples (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Legacy of the Apollo samples is the link forged between radiometric ages of rocks and relative ages from crater counts. Lunar impact history innumerous reviews, including NVM-2.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN67098 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    Visualization and Analysis of Solar System Small Bodies with NASA's Solar System Treks Project (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: In its investigations of Vesta and Ceres, NASAs Dawn mission has returned spectacular data detailing the surfaces of these two prominent small bodies in our Solar Systems asteroid belt. In order to greatly facilitate dissemination, visualization, and analysis of this data, and public understanding of the mission, the Dawn mission has partnered with NASAs Solar System Treks Project (SSTP). SSTP has recently released an update to the Vesta Trek online portal (https://trek.nasa.gov/vesta/) and has released a new Ceres Trek portal (https://trek.nasa.gov/ceres/). This presentation will showcase the use of the Ceres Trek and Vesta Trek portals and demonstrate how they can be used to visualize and analyze particularly interesting landforms such as the pitted terrain on Vesta and relic cryovolcanoes on Ceres. We will also demonstrate the new VR capability that has been added to the portals, allowing users to generate their own virtual reality flyovers for any user-defined paths along the bodies surfaces. In addition to highlighting the portals for Ceres and Vesta, the presentation will preview additional portals being planned/developed for other small bodies. NASA and JAXA have requested the development of a portal for the asteroid Ryugu to facilitate dissemination, visualization, and analysis of data from Japans Hayabusa2 mission, and a portal for Mars moon Phobos in support of mission planning for Japans MMX mission. We are also planning a portal for the asteroid Bennu with data from the OSIRIS-Rex mission. All of these products are efforts in the NASA Solar System Treks Project (SSTP), available at https://trek.nasa.gov. NASA's Solar System Trek online portals provide web-based suites of interactive data visualization and analysis tools to enable mission planners, planetary scientists, students, and the general public to access mapped data products from past and current missions for a growing number of planetary bodies including the Moon, Mars, Vesta, etc. These portals are being used for site selection and analysis by NASA and a number of its international partners, supporting upcoming missions. In addition to demonstrating the capabilities of selected portals in this presentation, we will solicit input from the community for ideas for future enhancements to the portals.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN65591 , Japan Geoscience Union (JpGU) Meeting 2019; May 26, 2019 - May 30, 2019; Chiba; Japan
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    Searching for Martian Bio-Indicators and Extant Life Using Spacecraft (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: Current environmental conditions at the surface of Mars are hostile to life as we know it, but the near subsurface may well provide sufficient shielding to harbor simple life forms. This discussion focuses on methane which can be produced either abiotically or by microbial life and possible geological or biological sources for that methane in the subsurface.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64269 , Mars Extant Life: Whatýs Next conference; Nov 05, 2019 - Nov 08, 2019; Carlsbad, NM; United States
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    The Sedimentary History of Mars as Observed by Rovers (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Mars has a sedimentary history that spans billions of years. Orbital images have allowed for the identification of vast regional sedimentary deposits that can be traced over 100s of kilometers and are 100s of meters thick including localized alluvial, deltaic, and lacustrine deposits. Detections of secondary minerals in these deposits from orbital spectroscopy suggest the aqueous history of early Mars varied as a function of space and time. Orbital observations, however, provide a simplified and incomplete picture of Mars sedimentary history because measurements for inferring sediment transport and deposition, such as lithology, grain size, and internal structures, and measurements for inferring sediment source and aqueous alteration, such as outcrop-scale mineralogic and geochemical composition and diagenetic features, cannot be identified from orbit. Rover observations have significantly enhanced our view of ancient and modern sedimentary environments on Mars, resulting in detailed reconstructions of paleo-environments and habitability.
    Keywords: Lunar and Planetary Science and Exploration
    Type: LPI Contrib. No. 2132 , JSC-E-DAA-TN66078 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    Saponite Dissolution Experiments and Implications for Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Recent work suggests that the mineralogical sequence of the Murray formation at Gale crater may have resulted from diagenetic alteration after sedimentation, or deposition in a stratified lake with oxic surface and anoxic bottom waters. Fe-containing clay minerals are common both at Gale crater, and throughout the Noachian-aged terrains on Mars. These clay minerals are primarily ferric (Fe3+), and previous work suggests that these ferric clay minerals may result from alteration of ferrous (Fe2+) smectites that were oxidized after deposition. The detection of trioctahedral smectites at Gale crater by CheMin suggests Fe2+ smectite was also deposited during the early Hesperian. However, due to their sensitivity to oxygen, Fe2+ smectites are difficult to analyze on Earth and very few saponite dissolution rates exist in the literature. To the best of our knowledge, no experiments have measured the dissolution rates of ferrous saponites under oxidizing and reducing conditions. In order to better understand the characteristics of water-rock interaction at Gale crater, particularly the oxidation state, we report our results to date on ongoing syntheses of ferrous and magnesium saponites and dissolution experiments of natural saponite under ambient conditions. Future experiments will include the dissolution of synthetic ferric, ferrous, and magnesium saponites under oxidizing and anoxic conditions at a range of pH values.
    Keywords: Lunar and Planetary Science and Exploration
    Type: LPI Contrib. No. 2132 , JSC-E-DAA-TN66074 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    Interpreting Aqueous Alteration in the Murray Formation Using Reactive Transport Modeling (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Abundant evidence for liquid water exists at Gale crater, Mars. However, the characteristics of past water remain an area of active research. The first exposures of the Murray formation in Gale crater, Mars (Fig. 1) were studied with four samples analyzed using CheMin: Buckskin, Telegraph Peak, Mojave, and Confidence Hills. Analyses indicate differences in mineralogy and chemistry between the samples which have been attributed to changes in pH and oxidation state of depositional and diagenetic environments. Recent work also suggests that hydrothermal fluids may have been present based on the presence of Se, Zn, Pb, and other elements.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66065 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Spectral Properties of Hydrated Poorly Crystalline Materials for Spectral Analysis of the Moon and Mars (2019)
    In:  CASI
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    Publication Date: 2019-07-20
    Description: Visible/near-infrared (VNIR) reflectance spectra of both Mars [1] and the Moon [2] include hydration bands that vary across the planet and are not well explained in some cases. Poorly crystalline phases have been found at ~30-70 wt.% by CheMin in Gale crater, Mars in all samples measured to date [3]. Here we report on VNIR reflectance spectra of a large collection of amorphous and poorly crystalline materials. These include opal, allophane, imogolite, iron hydroxides/ oxyhydroxides (FeOx), and several synthetic materials containing Si, Al and/or Fe. All of these contain hydration bands due to water and OH that can be used to identify these materials remotely on planetary bodies.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66032 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Isolation and Monitoring of Cleanroom-Associated Microbial Contaminates From Geological Collections (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Microbial contamination is of particular interest to geological curation as many microorganisms can change mineral composition and produce compounds used as biosignatures used for the detection of life. Microbial cells can change the mineral composition of rocks through organic acid production and direct enzymatic oxidation/reduction of transition metals. Enzymatic oxidation of iron and manganese can occur at a rate several orders of magnitude faster than under abiotic conditions and produce highly reactive nanoparticle- sized oxides that can react and sorb other metals and organic compounds. Many fungi can also produce organic acids that dissolve and chelate mineral matrices chemically reducing and dissolving rock surfaces. Finally, several common soil-associated bacteria and fungi produce secondary metabolites that contain unusual amino acid analogs and non-ribosomal peptides containing both L- and D- chirality used in characterizing carbonaceous chondrites and the detection of extraterrestrial life.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN65757 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Remarkable Diversity of Refractory Inclusions in the Miller Range 090019 CO3.1 Chondrite (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: We have characterized the mineralogy, textures, bulk compositions, modal abundances and some mineral compositions in a suite of approximately 140 refractory inclusions from the MIL090019 carbonaceous chondrite. All of these 140 inclusions are found in a single thin section of this CO3.1 chondrite. These inclusions range from grossite- and hibonite-rich varieties, melilite-, spinel-, fassaite-diopside- and anorthite-rich types, and include a subset of aluminous AOAs (amoeboidal olivine aggregates). Grossite- and hibonite-bearing inclusions were discussed briefly in previous abstracts. X-ray mapping by energy dispersive spectrometry has permitted us to extract the bulk compositions of these inclusions from hyperspectral x-ray datasets. The bulk compositions of these inclusions represent the full range of recognized CAI (Calcium-Aluminumrich Inclusions) types.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN65245 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    The CAESAR New Frontiers Mission: 1. Expected Nature of the Returned Comet Sample (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Comets are time capsules from the birth of our Solar System that record pre-solar history, the initial stages of planet formation, and the sources of prebiotic organics and volatiles for the origin of life. These capsules can only be opened in laboratories on Earth. CAESAR (Comet Astrobiology Exploration Sample Return)s sample analysis objectives are to understand the nature of Solar System starting materials and how these components came together to form planets and give rise to life. Examination of these comet nucleus surface samples in laboratories around the world will also provide ground truth to remote observations of the innumerable icy bodies of the Solar System.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64974 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, Texas; United States
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  • 56
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    Trace Element Abundances of Olivine-Hosted Melt Inclusions in Shergottites Northwest Africa 7397 and Robert Massif 04262 (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Olivine-hosted melt inclusions (MIs) may retain trapped parent magma compositions as well as record progressive differentiation while magmas crystallize and ascend towards the surface [1,2 and references therein]. Major element compositions of the MIs, especially Fe and Mg, can be affected by post-entrapment re-equilibration with their host olivine [1,2]. Therefore, Fe/Mg ratio correction is required to obtain MI bulk compositions following equilibrium with their host olivine. Partition coefficients of most of the trace elements in olivine are very low (i.e. DOL/melt〈0.001). Thus, ratios of trace elements of olivine-hosted MIs are unlikely to be affected by post-entrapment re-equilibration and no correction is necessary [2]. Hence, tracking trace element behavior in MIs may constrain the composition of the parent magma and its evolution yielding insights on magma differentiation of shergottites. However, analyzing MIs for chemical compositions is a challenging task due to their low abundances and small sizes. Using a highly sensitive and precise micro-beam technique is essential to examine olivine-hosted MIs in order to measure trace element abundances. For this purpose, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is an excellent tool due to its wide range of laser spot sizes (1-150 m), ability to obtain raster analysis (several mm2) and lower detection limits (0.1 ppb) [3].
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64818 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    The 2008 Mars Phoenix Lander Thermal and Evolved Gas Analyzer (TEGA) Dataset: Placing Easily Interpretable Evolved Gas Data on the Planetary Data System (PDS) (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The Phoenix Scout Lander mission investigated the north polar region of Mars in 2008 with the goal to study the history of water, assess the past/present Martian climate, search for organics, and evaluate the potential for past/present microbial habit-ability on Mars. To accomplish this goal, the Phoenix Landers Thermal and Evolved-Gas Analyzer (TEGA) instrument assessed the gas composition of the Martian atmosphere and evaluated the mineralogy of the Martian regolith. The TEGA instrument consisted of eight small ovens connected to a 4 channel magnetic sector mass spectrometer. The ovens heated soil samples from ambient to 1000C where the gases (e.g., H2O, CO2, etc.) evolved from thermal decomposition of mineral phases were analyzed by the mass spectrometer. Minerals thermally decomposed at characteristic temperatures and the evolving gases indicated the presence of perchlorate, carbonate, and hydrated phases in the Phoenix landing site soils.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64834 , 2019 Lunar and Planetary Science Conference (LPSC); Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Lunar Reconnaissance Orbiter: Enabling CLPS Mission Success (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN66338 , Commercial Lunar Payload Services Program (CLPS); Mar 01, 2018; Greenbelt, MD; United States
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  • 59
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    Architecture and Dynamics of Kepler's Multi-Transiting Planet Systems.III. Comprehensive Investigation Using All Four Years of Kepler Mission Data (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: We study the orbital architectures of planetary systems orbiting within 1 AU of their stars by analyzing the ensemble of Kepler systems having two or more planet candidates. We use data from the entire Kepler mission, and in many cases we apply improved analysis techniques (e.g., replacing histograms by top-hat Kernel Density Estimators that avoid the loss of information resulting from choosing a particular phase for the bin boundaries) to extend and enhance the studies of Lissauer et al. (2011, ApJS 197, 8) and Fabrycky et al. (2014, ApJ 790, 146).These data show ~ 1700 transiting planet candidates in 〉 600 multiple-planet systems, far more than were available for our previous two studies. The increased numbers and better information about planetary radii and the properties of stellar hosts made possible by Gaia DR2 allow more statistically-robust analyses of the entire ensemble of Kepler multis as well as independent analyses of subsets of the population. We are thus able to contrast the dynamical configurations of small and large planets, short-period and longer-period planets, and planets orbiting various types of host stars. We reinforce our previous findings that most pairs of planets within the same system are neither in nor near low-order mean motion resonances and that there is a substantial excess of planets having period ratios slightly larger than those of first-order mean-motion resonances. However, neglecting three systems whose planets are locked in 3- body resonances and summing over all first-order mean motion resonances, the deficit of planet pairs with period ratios just narrow of resonance is as large as the excess of planets wide of resonance (within statistical uncertainties), suggesting that overall there is no overall excess of planet pairs in the vicinity of resonance. Other aspects of our study, including estimates of the typical relative inclinations of planetary orbits and their variations as functions of orbital period, planet sizes and stellar properties, are in progress, with results expected to be available for presentation by the time of the conference.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN65422 , Kepler & K2 Svience Conference; Mar 04, 2019 - Mar 08, 2019; Glendale, CA; United States
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    Exploration of Atmospheric Entries at Uranus & Neptune with HEEET as Heatshield TPS (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: One important observation from the recent Ice Giants Study sponsored by NASA was that the predicted and margined thicknesses of HEEET (new NASA TPS technology) were much greater than could be woven with the currently established loom capabilities. Since the cost of a loom upgrade would be substantial, the present work explores the entry trajectory space to determine what combinations of entry parameters would result in HEEET thicknesses that fit within the existing loom infrastructure. Toward this end, the entry trajectory space, parameterized by ballistic coefficient and entry flight path angle, was systematically explored for 45 sphere-cone geometries of 3 different radii 0.2 m, 0.3 m, and 0.4 m which covered the range from Galileo-derived probes considered in the Ice Giants Study, and a follow-on study on the possibility of using a single probe architecture (in terms of size and mass) for various destinations, including Venus, Saturn, Uranus, and Neptune. The entry velocities, latitudes, and azimuths at Uranus and Neptune used in the present work were taken from the Ice Giants Study. For each 3D OF trajectory generated by a NASA Ames in-house code, TRAJ, the material response and thickness were computed using another NASA Ames code, FIAT, along with a margins policy proposed by the HEEET project. In the present work, ballistic coefficients ranging from 200 kg/sqm to 350 kg/sqm were considered along with entry flight path angles ranging from -16 to -36 (primarily to allow deceleration loads to vary between 50 g and 200 g).
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN65499 , Workshop on In Situ Exploration of the Ice Giants; Feb 25, 2019 - Feb 27, 2019; Marseille; France
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    Apollo 50 Next Giant Leap (2019)
    In:  Other Sources
    Details
    Publication Date: 2019-07-25
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: MSFC-E-DAA-TN70754 , Anniversary Apollo NASA Spinoff Presentation; Jul 19, 2019; Ronks, PA; United States
    Format: text
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    Seismometer to Investigate Ice and Ocean Structure (SIIOS) (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-24
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: MSFC-E-DAA-TN70725 , IUGG General Assembly; Jul 08, 2019 - Jul 18, 2019; Montréal, Québec; Canada
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    Recreating in Situ Measurements of Potentially Hazardous Meteoroids (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-23
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: M19-7424 , Meteoroids 2019; Jun 17, 2019 - Jun 21, 2019; Bratislava, Slovakia
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    Bolides Detected by GLM and Ground-Based Meteor Networks (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: M19-7432 , Meteoroids 2019; Jun 17, 2019 - Jun 21, 2019; Bratislava, Slovakia; Czechoslovakia
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    Meteor Shower Fluxes with All Sky Cameras (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: No abstract available
    Keywords: Lunar and Planetary Science and Exploration
    Type: M19-7416 , Meteoroids 2019; Jun 17, 2019 - Jun 21, 2019; Bratislava, Slovakia
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    Deviation of the Shape of Bennu from Rotational Figures of Stability (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Images of asteroid (101955) Bennu acquired by the OSIRIS-REx mission reveal a rocky world covered in rubble; Shape deviates from hydrostatic surface; Internal friction and/or cohesion even if no tensile strength; Understanding the deviation of the surface from idealized shape may help constrain mechanical properties of the interior; Geologic evolution of Bennu is driven by downslope migration of surface material and rubble; May be caused by YORP-induced spin-up, re-accumulation, impact-induced seismic shaking, thermal stresses, or tidal disruption by close encounters to larger bodies.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN66762 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    Managing Planetary Dust During Surface Operations (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: This book chapter describes the issues surrounding managing planetary dust during surface operations. It summarizes the effects of dust on surface operations, the effects of planetary surface environments on dust transport, and a snapshot of current dust mitigation technologies.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GRC-E-DAA-TN60764
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  • 68
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    Kepler's Multiple Planet Systems (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: Among the 1800 Kepler targets that have candidate planets, 20% have two or more candidate planets. While most of these objects have not yet been confirmed as true planets, several considerations strongly suggest hat the vast majority of these multi-candidate systems are true planetary systems. Virtually all candidate systems are stable, as tested by numerical integrations (assuming a nominal mass-radius relationship). Statistical studies performed on these candidates reveal a great deal about the architecture of planetary systems, including the typical spacing of orbits and flatness of planetary systems. The distribution of observed period ratios shows that the vast majority ofcandidate pairs are neither in nor near low-order mean motion resonances. Nonetheless, there are small but statistically significant excesses of candidate pairs both in resonance and spaced slightly too far apart to be in resonance, particularly near the 2:1 resonance. The characteristics of the confirmed Kepler multi-planet systems will also be discussed.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN67246 , Colloquium at Columbia University in New York City; Apr 17, 2019; New York, NY; United States
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  • 69
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    Fine-Grained, Spinel-Rich Ca-Al-Rich Inclusions From The Reduced CV3 Chondrite Efremovka: A Genetic Link To Wark-Lovering Rims? (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Fine-grained, spinel-rich Ca-Al-rich inclusions (FGIs) in carbonaceous chondrites, mostly CV3 chondrites, are interpreted as aggregates of nebular gas-solid condensates that escaped significant melting [1]. Multiple lines of evidence suggest a condensation origin for FGIs, including their layered structures and irregular shapes and the fine grain size of numerous spinel-cored nodules [e.g., 2,3], and the distinctive volatility-fractionated group II rare earth element patterns of bulk inclusions and their mineral constituents [e.g., 4,5]. The origin and nature of FGIs are poorly constrained because of their fine grain sizes and intimate intergrowths of refractory phases, combined with their susceptibility to secondary parent body alteration processes, making detailed mineralogical and petrologic characterizations difficult using scanning electron microscope (SEM) and electron microprobe techniques. In this study, we present preliminary transmission electron microscope (TEM) analyses of pristine FGIs from the reduced CV3 chondrite Efremovka in order to provide the detailed characterization of their micrometer- to nanometer-scale textures and chemical compositions. Our goals are to better understand the formation processes and conditions of FGIs in the early solar nebula and to explore their possible genetic relationship with other early-formed refractory inclusions and their rims.
    Keywords: Lunar and Planetary Science and Exploration
    Type: LPI Contrib. No. 2132 , JSC-E-DAA-TN66092 , Lunar and Planetary Science Conference 2019 (LPSC); Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    Oxychlorine Detection in Gale Crater, Mars and Implications for Past Environmental Conditions (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The Sample Analysis at Mars (SAM) instrument on the Mars Science Laboratory (MSL) rover Curiosity has analyzed 3 scooped samples and 15 drilled samples since landing in 2012. Oxychlorine compounds (perchlorate/chlorate) were detected in the first 9 drilled samples but have not been detected in the last 6, starting with the Oudam sample in the Hartmanns Valley member of the Murray formation (Table 1). Scooped samples have all contained detectable oxychlorine. These results suggest that oxychlorine formation and preservation spans the geologic record on Mars but has not been uniform spatially or temporally.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64978 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    Using Mineralchemistry in Gale Crater Sedimentary Rocks to Constrain Ancient Igneous Processes on Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Over the last decade, various datasets have shown evidence for unexpected Noachian felsic materials at the surface of Mars. The Martian meteorite NWA 7034, also well-known as Black Beauty, has been identified as a regolith breccia containing mafic clasts along with remarkable felsic igneous clasts dated at 4.43 Gyr and classified as monzonitic [1-2]. In addition, the Curiosity rover has been analyzing felsic materials within Gale crater since its landing in 2012 [3-4]. The X-ray diffractometer (XRD) in the CheMin instrument and the laser induced breakdown spectrometer (LIBS) ChemCam onboard Curiosity identified plagioclase and K-spar along with augite and pigeonite [3-5]. In sedimentary rocks, those minerals are detrital, coming from a magmatic source of Noachian age that was sufficiently evolved to form K-spar [1,6]. Several igneous materials analyzed by Chem- Cam have been classified as part of the alkaline trend including Harrison, a trachy-andesite [7].
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66077 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Compositional Characteristics and Trends Within the Vera Rubin Ridge, Gale Crater, Mars as Determined by APXS: Sedimentary, Diagenetic and Alteration History (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The Mars Science Laboratory (MSL) Curiosity rover has spent the last two years investigating a prominent resistant ridge, informally named the Vera Rubin Ridge (VRR), at the base of Mount Sharp (Aeolis Mons). The ridge has been a high priority science target for the MSL mission since landing in Gale crater more than 6 years ago because of the detection of a strong hematite spectral signature, and its distinct topography. Examining the chemistry of the ridge can aid in determining the relationship to other rocks analyzed during the rover traverse, specifically the Murray formation (fm) encountered below the ridge. We can also determine compositional trends with elevation and/or laterally within the ridge, and whether spectral properties observed on the ridge, both from orbit and in situ, correspond with changes in chemistry. The composition of the ridge, combined with mineralogy of drilled samples, can help to elucidate bigger picture questions regarding depositional environment, possible changing lake water chemistry and diagenetic/alteration history.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66081 , Lunar and Planetary Science Conference (LPSC); Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    X-ray Amorphous and Poorly Crystalline Fe-Containing Phases in Terrestrial Field Environments and Implications for Materials Detected on Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Recent analyses of X-ray diffraction (XRD) data from the CheMin instrument using the FULLPAT program have documented the presence of X-ray amorphous materials at multiple sites within Gale Crater, Mars. These materials are believed to be to be iron-rich based on chemical data, and at least some of them are believed to be weathering products based on volatile contents. However, the characteristics of these proposed Fe-rich weathering products remain poorly understood. To better understand these X-ray amorphous materials on Mars, we are 1) examining weathering products formed on Fe-rich parent material in terrestrial soils across a range of climatic conditions, and 2) performing burial experiments of Fe- and Mg- rich olivine in these soils. We describe each of these approaches below.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66033 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Variations in Visible/Near-Infrared Hematite Spectra Related to Grain Size and Crystallinity (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Drill fines created by the Curiosity rover at Gale Crater, Mars have exhibited variable visible/near-infrared spectral features attributable to the presence of ferrous and ferric minerals. Drilled locations within the Murray formation and on the Vera Rubin Ridge (VRR) were shown by the CheMin instrument to contain significant amounts of hematite. However, typical hematite spectral features (e.g., absorptions near 530 nm and 860 nm) have varied inconsistently with hematite abundances. This suggests that other factors such as hematite grain size or crystallinity, the presence of amorphous materials, and/or photometric effects play a role in the observed spectra. Using laboratory spectra of hematite acquired at difference grain sizes, we document the variability in key spectral features. We also compare spectral parameters computed from Mastcam spectra on Mars of three hematite-bearing ChemCam calibration target (CCCT) samples with known hematite and amorphous material abundances.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66067 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    A Kuiper Belt Source for Solar Flare Track-Rich Interplanetary Dust Particles (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The presence of solar flare particle tracks in mineral grains within interplanetary dust particles (IDPs) has long been accepted as proof of their extraterrestrial origin [e.g. 1]. The 10-20 micrometers diameter IDPs released by dust producing objects in the solar system (mainly comets and asteroids) spiral in towards the Sun under the influence of Poynting-Robertson (PR) drag forces [2] and accumulate solar flare energetic particle tracks during their journey. The number of IDPs with well-constrained track density measurements is small, owing to the difficulty in the measurements and the lack of appropriatelysized crystals in which to image them. In order to use track densities as a chronometer of space exposure, the track production rate must be known. All previous work relied on track production rates determined by chemical etching techniques [e.g. 3], but tracks in IDPs are measured using TEM imaging. Here we report measurements of track densities in IDPs from both the anhydrous and hydrated IDP groups. Using the track production calibration determined from TEM observations of anorthite and olivine in lunar rock 64455 [4] we estimate space exposure times for these IDPs to constrain their parent body sources.
    Keywords: Lunar and Planetary Science and Exploration
    Type: LPI Contrib. No. 2132 , JSC-E-DAA-TN66088 , Lunar and Planetary Science Conference (LPSC); Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    Spectral Interpretation of Magmatic Evolution, Oxidation, and Crystallinity in a Volcanic Planetary Analog System (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Volcanic surfaces are common and varied throughout the terrestrial planets. Remote spectroscopy is often the only method for determining surface chemistry and mineralogy of such provinces, and is thus critical for understanding petrologic processes and constraining planetary interior evolution and chemistry. Natural volcanic systems exhibit variability in magmatic chemical evolution, crystallinity, oxidation, and eruption-related alteration (e.g. hydrothermal). The extent to which spectroscopy can identify these characteristics alongside each other is thus a key question for interpreting volcanic processes from orbit. While the effects of each of these on visible/near infrared (VNIR) and thermal infrared (TIR) spectra of igneous rocks has been studied separately to varying degrees, their combined spectral effects (and interpretability of such spectra) are understudied.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66079 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Thermochemical Modelling of Fluid-Rock Reactions in Vera Rubin Ridge, Galecrater, Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Vera Rubin Ridge (VRR) in Gale Crater, Mars, is a ~200 m wide ~6.5 km long northeast- southwest resistant geomorphological feature on the northern slopes of Aeolis Mons (Mt. Sharp). Analysis of Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) orbital data showed that VRR has strong hematite spectral signatures. Hematite was confirmed in-situ at VRR with the Curiosity rover and has been shown to be present throughout the Mur- ray formation. VRR is stratigraphically continu-ous with the underlying Murray formation. Previous thermochemical modelling showed how hematite at VRR could have formed as the result of open-system weathering at high water/rock ratios. Here we use thermochemical modelling to investigate possible reaction pathways for the hematite-clay- bearing assemblage observed at VRR, starting from an identified least-altered (minimum clay content) Murray composition, and a Mars basal brine.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66082 , Lunar and Planetary Science Conference (LPSC); Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Rock Hard Science: Multispectral and Mineralogical Investigations to Understand Bedrock Spectral Properties and Strength at Vera Rubin Ridge, Gale Crater, Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Since the beginning of the Mars Science Laboratory (MSL) mission, Vera Rubin Ridge (VRR) has been a location of interest to the MSL science team because of its apparent erosional resistance and strong near-IR (~860 nm) absorption feature seen from orbit in the Mars Reconnaissance Orbiter mission's Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) data. The strong CRISM absorption feature along VRR was hypothesized to be primarily associated with an increased abundance of crystal-line hematite compared to lower Mt. Sharp units. How-ever, surface multispectral and mineralogic data, from the Mastcam and CheMin instruments onboard the Curiosity rover, suggest hematite is not the only mineral contributing to the near-IR absorption feature measured in VRR or the reason for its relative hardness.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66066 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Estimated Refractive Indices of Calcite, Dolomite, and Magnesite: ~0.3-500 M. (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Carbonate minerals are germane to questions involving volatile and climate history on Mars [e.g., 1-2]. In particular, the abundance of carbonate-bearing minerals can provide broad useful bounds on the amount of CO2 out-gassed into the atmosphere over its history and their spatial distribution and mineralogy can yield constraints on the environments in which they were produced. Earth-based, orbital, and landed spectral observations provide evidence for the presence of carbonates in the Martian environment [3-6]. Infrared observations made from spacecraft near Mars were interpreted to indicate the presence of carbonates. [6] associated the carbonates with the surface dust and interpreted the mineralogy as being consistent with magnesite (MgCO3). Near- infrared observations from Mars orbit have been interpreted to suggest magnesite outcrops in restricted locations [7-9]. Quantitative estimates of the abundance of carbonates on Mars range from 0-3% [3], 2-5% [6], less than a few percent [10], and 〈10% [8]. With the growing evidence for magnesite on Mars additional quantitative estimates can be provided via theoretical modeling of the reflectance from the Martian surface. Calcite (CaCO3) and dolomite ((Ca,Mg)CO3) are identified in Asian dust [2-17%], [10] and calcite in Saharan dust [~8-10% [12-15]. The importance of op- tical constants at visible and near-infrared wavelengths as proxies for estimating the effects at infrared wave- lengths, has been investigated [15]. The growing evidence for Mg-carbonates on Mars, the presence of calcite and dolomite in terrestrial aero- sols, and general lack of optical constants for these materials in the visible- to mid-infrared (VMIR, ~0.3-6 m) has motivated the current effort to estimate the optical constants of calcite, dolomite, and magnesite in the VMIR.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN65415 , Lunar and Planetary Science Conference (LPSC); Mar 18, 2019 - Mar 22, 2019; The Woodlands, TX; United States
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    A Two Gigayear History of Germanium Outgassing from Shergottites (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Germanium (Ge) and Zn enrichment in martian sedimentary rocks has been reported from rocks at Gale Crater, showing concentrations of Ge from tens to hundreds ppm [1]. The Ge concentrations in martian meteorites are significantly lower (0.5-2.5 ppm) [2]. Our recent studies [3-4] have revealed that Ge is lost from shergottites due to volatility. Recent experimental studies confirm that Ge and Zn are both significantly volatile under magmatic conditions [5-7]. Further, Ge is moderately incompatible during magmatic differentiation [8] so Ge contents in olivines or pyroxenes increase during igneous fractionation in nakhlites and chassignites [4]. Shergottites for which Ge abundances had been determined included rocks with ages of 150-600 Ma, while the enrichments reported from Gale Crater rocks likely occurred over 3 Ga ago. The recent discovery of two unpaired ancient (2.4 Ga) depleted shergottites, NWA 7635 [9] and NWA 8159 [10], afforded the prospect of obtaining an extended history of martian volcanic outgassing. Both of the ancient shergottites are depleted in incompatible elements and share a similar GCR exposure age to younger depleted shergottites implying derivation from a single, long-lived (〉2 Ga) volcanic center [9].
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64816 , 2019 Lunar and Planetary Science Conference (LPSC); Mar 18, 2019; Woodlands, TX; United States
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    Ready for Our Trip to Mars? Turning the Red Planet Blue (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Mars exploration is one of the major current scientific breakthroughs. NASA is actively developing its Mars Exploration Program through several rovers and orbiters to better understand the origin and current conditions of the Red Planet. Since Mars is more Earth-like than any other planet, understanding its formation and evolution could enable to better understand our own origin. Mars is also considered as a future destination for survival of humankind, assuming our ability to face remaining technical challenges, such as radiation risks, extreme conditions, food and medicine supplies. The recent evidence of liquid water on Mars suggests that life could exist, and will be seeked by NASA Mars 2020 rover. Thus, Mars exploration opens remarkable perspectives towards the discovery of new resources and the humanity's expansion. But this tremendous potential also implies completely new questions: what will happen to the Earth if humans are able to escape from global warming and pollution? How will the Martian land be shared between Nations? Will it be impacted by political conflicts on the Earth? If life exists on Mars, will it be compatible with humans? As we get closer to Mars colonization every day, these questions should be addressed and considered as a new chance to envision a world that could benefit from the lessons of History. So, in addition to technical and scientific progress, Mars exploration gives us the chance to redefine our society as a whole.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN65420 , TEDx UniversitýLyon3; Mar 05, 2019; Lyon; France
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    Calculated Thicknesses of Volcanically Derived Water Ice Deposits at the Lunar Poles (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Overview - What we know: Volcanically derived volatiles; Timing of volatile release; Current observations of lunar polar volatiles - How volatiles migrated on the Moon - Thickness of resulting deposits - Implications for the current distribution of lunar volatiles.
    Keywords: Lunar and Planetary Science and Exploration
    Type: MSFC-E-DAA-TN66767 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    Partially Chloritized Smectites: Analogues of Smectites at Gale Crater, Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Characterizing the structure and composition of phyllosilicates is important for interpreting the aqueous history of Mars and identifying potential habitable environments. Smectites and chlorites are the most dominant clay types on Mars, and there is evidence of the presence of smectite/chlorite intergrades. Smectite has been detected at Gale Crater, Mars, via orbital observations and in-situ measurements, in abundances up to approximately 25 weight percentage of bulk rock. John Klein (JK) and Cumberland (CB) were analyzed by the Chemistry and Mineralogy (CheMin) and Samples Analysis at Mars (SAM) evolved gas analysis experiment (EGA) instruments, onboard Mars Science Laboratory (MSL), Curiosity, to distinguish clay mineralogy. John Klein has a collapsed 2:1 smectite with a d-spacing of 10 Angstroms, whereas Cumberland smectite did not fully collapse and has a d-spacing of approximately 13.2 Angstroms. It has been suggested that partial chloritization or pillaring could be responsible for the expanded Cumberland smectite because pillaring inhibits the collapse of smectites down to 10 Angstrom, even under the desiccating conditions on the martian surface. Clay minerals have been detected in ancient fluvio-lacustrine rocks throughout Curiositys traverse and catalog the changes of the lake water chemistry and diagenetic conditions at Gale Crater, Mars. Investigating clay minerals is important for identifying them on the Martian surface, in particular as Curiosity proceeds into the upcoming Clay-bearing Unit.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64975 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, Texas; United States
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    Acid-Sulfate Weathering Environment at Shergottite Provenance on Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: In some impact melt (IM) glasses in the shergottites such as EET79001, Shergotty and Tissint, recently showed that secondary mineral assemblages having large sulfur excesses cannot be produced in-situ by impact shock melting of the host rock constituents. Instead, these putative secondary minerals inferred to be present in IM glasses were produced somewhere else in the shergottite source region and were subsequently mobilized into the host rock voids (by lava erosion or aolian activity) prior to impact ejection. In this abstract, we examine the aqueous conditions (pH and water/rock ratios) under which the acid sulfate solutions could have interacted with the primary minerals in the basaltic rocks and precipitated the secondary minerals such as Fe-sulfates in some cases and Ca- and Al-sulfates in other cases under favorable conditions at the shergottite provenance on Mars.
    Keywords: Lunar and Planetary Science and Exploration
    Type: LPI Contrib. No. 2132 , JSC-E-DAA-TN65247 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    JSC-Rocknest: a Large-Scale Mojave Mars Simulant (MMS) Based Soil Simulant for In-Situ Resource Utilization Water-Extraction Studies (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The Johnson Space Center Rocknest (JSC-RN) simulant was developed in response to a need by NASA's Advanced Exploration Systems (AES) In Situ Resource Utilization (ISRU) project for a simulant to be used in component and system testing for water extraction from Mars regolith. JSC-RN was de-signed to be chemically and mineralogically similar to material from the aeolian sand shadow named Rocknest in Gale Crater, particularly the 1-3 weight percentage water release as measured by the Sample Analysis at Mars (SAM) instrument. Rocknest material is a proxy for average martian soils, which are unconsolidated and could be easily scooped by rovers or landers in order to extract water. One way in which water can be extracted from aeolian material is through heating, where adsorbed and structural water is thermally removed from minerals. The water can then be condensed and used as drinking water or split and used as propellant for spacecraft or as a source of breathable O2. As such, it was essential that JSC-RN contained evolved gas profiles, especially low temperature water (less than 400 degrees Centigrade), that mimicked what is observed in martian soils. Because many of these ISRU tests require hundreds of kilograms of Mars soil simulant, it was essential that JSC-RN be cost-effective and based on com-ponents that could be purchased commercially (i.e., not synthesized in the lab). Here, we describe the JSC-RN martian soil simulant, which is ideal for large-scale production and use in ISRU water extraction studies.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN65163 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    A Diversity of Calcium-Rich Carbonates in EETA 79001 (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: Carbonate minerals of martian origin are present in several martian meteorites in trace concentrations (less than 1 percent) and possess unique isotopic signatures that suggest that the martian environment and/or isotopic reservoirs are very different from the Earths. Carbonates are most common in the older martian meteorites (ALH 84001 and the nakhlites), however, there have been reports of carbonate in the younger shergottites including EETA 79001 (Mars meteorite Elephant Moraine 79001). Acidification studies of Zagami and Shergotty have shown that CO2 is released suggesting that carbonate phases are present in these meteorites, but the origin of these phases is controversial. The young ages of the shergottites makes them important samples for understanding the modern martian environment. The carbonates in EETA 79001 are the best-characterized secondary minerals in a shergottite, but their origin remains controversial. Gooding et al. argued that two types of carbonate occur with-in the glassy parts of the meteorite. One type, nearly pure CaCO3 associated with Ca-sulfate shows textural evidence for being present in the rock prior to it being shocked, suggesting formation on Mars. The second was more abundant and consists of Ca-rich carbonate, possibly with finely intergrown Mg-phosphate, but does not possess any textural relationships indicative of a martian origin. Carbon and oxygen isotopic studies of this carbonate yielded oxygen isotopes that potentially suggest a martian origin as well
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN66442 , Lunar and Planetary Science Conference (LPSC 2019); 18ý22 Mar. 2019; The Woodlands, TX; United States
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    Origin and Speciation of Sulfur Compounds in the Murray Formation, Gale Crater, Mars (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-20
    Description: The Mars Curiosity rover has traversed nearly 20 km and gained over 350 meters in elevation since landing in Gale crater in August 2012. Through 2250 sols of surface operations, Curiosity has spent approximately 60% of its time investigating the Murray formation, a unit of layered sediments. The occurrence of sulfur compounds in the Murray formation has been established by imaging of light-toned veins by MastCam and MAHLI, chemical compositions measured by the Alpha Particle X-ray Spectrometer (APXS) and ChemCam, crystalline phase identifications by the CheMin X-ray diffractometer, and evolved gas analyses from the Sample Analysis at Mars (SAM) instrument.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64832 , Lunar and Planetary Science Conference; Mar 18, 2019 - Mar 22, 2019; Woodlands, TX; United States
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    Boots on Moon: Going Forward to the Moon to Stay (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This package is for the conduct of a workshop during the International Space University Space Studies Program in the summer of 2019 being held in Strasbourg, France. It gives publicly available information on NASA and international plans to move beyond low Earth orbit to the Moon and discusses challenges and capabilities. This information will provide the participants a basic level of insight to develop a response on their perceived obstacles to a future vision of humans endeavors on the Moon.
    Keywords: Lunar and Planetary Science and Exploration
    Type: KSC-E-DAA-TN70238 , International Space University Space Studies Program (SSP19): Exploration Workshop; Jun 24, 2019 - Aug 23, 2019; Strasbourg; France
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    Percentage of Water Retained in Icy Lunar Regolith Simulant During Transfer into a Sample Container (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: We now know that water ice exists on the lunar surface thanks to the findings of multiple lunar missions such as LRO and LCROSS. However, before we develop systems that can utilize this precious resource at a useful scale, we need to acquire more data about the concentration of water in the lunar regolith and how it may vary by depth and location. The OVEN (Optimized Volatile Extraction Node) system is designed to determine the concentration of water as part of an instrument called WAVE (Water Analysis & Volatile Extraction) which can be deployed during a lunar resource prospecting mission. Experiments were carried out at the Johnson Space Center in order to better understand the potential losses of water that may occur during a prospecting mission when a sample is transferred from a drill to the OVEN. A description of the experiment as well as the results will be presented here.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN69624 , Engineering Mechanics Institute Conference 2019; Jun 18, 2019 - Jun 21, 2019; Pasadena, CA; United States
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    Gas Giants (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The gas giants (Jupiter and Saturn) and icy giants (Uranus and Neptune) are fluid planets with atmospheres primarily made of hydrogen and helium. The part of their atmospheres accessible to remote sensing occupies only a small fraction of their radii (0.05%). Clouds and hazes form around the 1 bar altitude pressure level and extend vertically, according to the thermochemical models, in a layer with a thickness of 200_500 km where temperature increases with depth (usually known as the "weather layer"). Clouds made of NH3, NH4SH, H2O (in Jupiter and Saturn), with the addition of CH4 (in Uranus and Neptune), cover the planet in stratified layers that are mixed with unknown hromophore agents. Dynamical phenomena in the weather layer shape different cloud patterns that define the visible appearance of these planets. In the thermal part of the spectrum clouds act as opacity sources providing brightness contrasts. The ensemble of cloud morphologies in terms of shapes, sizes and albedos allows their use as tracers of the atmospheric motions in the weather layer (Fig. 4.1). This is the main tool employed so far to study the winds on these fourplanets.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN62150 , Zonal Jets: Phenomenology, Genesis, and Physics; 72-103
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    Lunar Seismometer and Burial System (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Beginning in 1969, Apollo successfully deployed a long-lived network of seismometers on the Moon. Seismic studies provide definitive knowledge of internal planetary structure, and analysis of the Apollo seismic data has contributed to the magma ocean hypothesis for initial terrestrial planetary differentiation [Wieczoreket al., 2006]. While the general model is widely accepted, details such as mantle composition, stratification and possible overturn, lateral structure, and thermal inhomogeneities remain unresolved. The Moon experiences moonquakes at varying depths [Nakamura, 1983]. Shallow quakes are relatively large but rare, similar to terrestrial intra-plate earthquakes. Deeper quakes are comparatively smaller but more frequent, occurring periodically according to the tidal cycle. On the Moon, the lack of an atmosphere enables seismic experiments to potentially constrain meteorite impact flux, which informs cratering rates assumed throughout the solar system. The large diurnal temperature variation between day and night also induces thermal moonquakes, which may contribute to regolith production [Duennebier& Sutton, 1974; Weber et al., 2017]. Still, many questions remain regarding the frequency and distribution of natural moonquakes. This translates into an incomplete understanding of the Moons hemispherical dichotomies in crustal thickness, mare volcanism, seismicity, and the distribution of heat-producing elements. The Planetary Decadal Survey (National Research Council, 2013) identifies a New Frontiers Lunar Geophysical Network (LGN) mission to answer such questions.
    Keywords: Lunar and Planetary Science and Exploration
    Type: MSFC-E-DAA-TN67862 , 2019 SSA Annual Meeting; Apr 23, 2019 - Apr 26, 2019; Seattle, WA; United States
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    Venus Topography and Boundary Conditions in 3D General Circulation Modeling (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: We describe how one ingests 3D topographic data from NASA's Venus Magellan Spacecraft radar observations into the ROCKE-3D Planetary General Circulation Model. We also explain how boundary condition choices such as ocean/lake coverage/depth, rotation rate, atmospheric constituents, and other factors influence surface conditions in ROCKE-3D paleo-Venus simulations. Studies such as these should also be considered when examining liquid water habitability in similar exoplanet experiments.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN65971 , Planetary Cartography and GIS; 325-335
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    Life's Requirements (2019)
    In:  CASI
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    Publication Date: 2019-07-13
    Description: Life on Earth is molecular in nature, with its lifelike attributes- e.g., information processing and catalysis- emerging as a result of both the specific properties of those molecules and the interactions among them. If this is a general model for life, then life must require (i) a source of energy, with which to build and sustain molecular complexity and information processing; (ii) elemental raw materials, from which to construct molecules having specific properties and reactivity; (iii)a solvent that supports the synthesis of the full range of molecules required by life and properly mediates the full range of necessary interactions among those molecules; and (iv) physicochemical conditions in which life's molecules can be synthesized, are appropriately stable, and can interact as needed for lifelike function. For life on Earth, these general requirements, respectively, take the specific form: (i) light energy in visible-to-near-infrared wavelengths or chemical energy as provided by oxidationreduction disequilibrium, (ii) the "biogenic "elements (carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur) (iii)liquid water, and (iv) specific ranges in temperature, pH, salinity, pressure, and other environmental factors. Our knowledge of these factors relates to cellula rlife as we observe it now or can infer from the fossil or molecular records. Life's origin may be constrained by a more stringent set of requirements that are, as yet,not fully understood.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN65330 , Handbook of Exoplanets (ISSN 978-3-319-55332-0) (e-ISSN 978-3-319-55333-7); 2795-2816
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    A Giant Impact as the Likely Origin of Different Twins in the Kepler-107 Exoplanet System (2019)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R(sub )) range from low-density sub-Neptunes containing volatile elements to higher-density rocky planets with Earth-like or iron-rich (Mercury-like) compositions. Such astonishing diversity in observed small exoplanet compositions may be the product of different initial conditions of the planet-formation process or different evolutionary paths that altered the planetary properties after formation. Planet evolution may be especially affected by either photoevaporative mass loss induced by high stellar X-ray and extreme ultraviolet (XUV) flux or giant impacts. Although there is some evidence for the former, there are no unambiguous findings so far about the occurrence of giant impacts in an exoplanet system. Here, we characterize the two innermost planets of the compact and near-resonant system Kepler-107 (ref. 9). We show that they have nearly identical radii (about 1.51.6R(sub )), but the outer planet Kepler-107 c is more than twice as dense (about 12.6 g cm3) as the innermost Kepler-107 b (about 5.3 g cm3). In consequence, Kepler-107 c must have a larger iron core fraction than Kepler-107 b. This imbalance cannot be explained by the stellar XUV irradiation, which would conversely make the more-irradiated and less-massive planet Kepler-107 b denser than Kepler-107 c. Instead, the dissimilar densities are consistent with a giant impact event on Kepler-107 c that would have stripped off part of its silicate mantle. This hypothesis is supported by theoretical predictions from collisional mantle stripping, which match the mass and radius of Kepler-107 c.
    Keywords: Lunar and Planetary Science and Exploration
    Type: GSFC-E-DAA-TN65366 , Nature Astronomy (e-ISSN 2397-3366)
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    Volatile Element Depletion of the Moon The Roles of Pre-Cursors, Post-Impact Disk Dynamics, and Core Formation (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The compositional and isotopic similarity of Earths primitive upper mantle (PUM) and the Moon has bolstered the idea that the Moon was derived from the proto-Earth, but the Moons inventory of volatile lithophile elements Na, K, Rb and Cs are lower than in Earths PUM by a factor of 4 to 5. The abundances of fourteen other volatile elements exhibit siderophile behavior (volatile siderophile elements or VSE; P, As, Cu, Ag, Sb, Ga, Ge, Bi, Pb, Zn, Sn, Cd, In, and Tl) that could be used to evaluate whether the Moon was derived from the proto-Earth, and whether their depletion can be attributed to volatility or core formation. In this study, newly available core-mantle partitioning data are used, together with bulk Moon compositions, protolunar disk dynamics modelling to test the hypothesis that the Moon was derived from PUM-like material. At lunar core formation conditions, As, Sb, Ag, Ge, Bi, Sn are siderophile, whereas P, Cu, Ga, Pb, Zn, Cd, In and Tl are all weakly siderophile or lithophile. Most of the VSE can be explained by a combination of known processes pre-cursor volatile depletion, melt-gas dynamics and equilibria in the protolunar disk, and core formation. Explaining this whole group of volatile elements may require a combination of mixing and separation of the newly formed Moon from remnant gas rich in the highest volatility VSEs. This large group of volatile elements informs a wide temperature range and offers a powerful test of melt-gas segregation mechanisms in the protolunar disk and lunar formation hypotheses.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN64690 , Science Advances (e-ISSN 2375-2548); 5; 1; eaau7658
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    Study of Sabatier Catalyst Performance for a Mars ISRU Propellant Production Plant (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-17
    Description: NASA is currently developing technologies for use in the field of in-situ resource utilization (ISRU). One of the technologies being advanced is the Sabatier, or methanation, reactor which converts carbon dioxide and hydrogen into methane gas and water at high temperatures. This paper discusses the catalyst life and performance issues for these reactors that would be expected on Mars and describes the test methods employed and observed results. The various catalysts were tested in their capacity for the continuous production of methane gas via the Sabatier reaction and the possible effects of launch vibration loads, exposure to liquid water, particulate contamination, and chemical contamination to the overall observed reaction efficacy of the catalysts evaluated.
    Keywords: Lunar and Planetary Science and Exploration
    Type: KSC-E-DAA-TN68551 , International Conference on Environmental Systems (ICES) 2019; Jul 07, 2019 - Jul 11, 2019; Boston, MA; United States
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    Perchlorate on Mars - Overview and Implications (2019)
    In:  CASI
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    Publication Date: 2019-08-02
    Description: Perchlorate was first detected on Mars by the Wet Chemistry Laboratory (WCL) instrument on the Phoenix lander at a concentration of ~0.5 wt% in northern plains soils. Since that initial detection, perchlorate (and likely chlorate) have been detected on Mars by both surface and orbital instruments. Perchlorate (ClO4-) is an oxidized chlorine compound and salts of perchlorate are kinetically stable (though very reactive at high temperature), very soluble, deliquescent, and have low eutectic temperature (which decreases the temperature for stable liquids on Mars). Chlorate (ClO3-) salts are similar, though they are less kinetically stable than perchlorates. Because many of the analytical signatures of perchlorate and chlorate are similar to the instruments we have used on Mars, we cannot always determine which species is present, so we will use the more generic term oxychlorine when referring to perchlorate and/or chlorate.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN70050 , International Conference on Mars; Jul 22, 2019 - Jul 25, 2019; Pasadena, CA; United States
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    Planetary Rover Simulation for Lunar Exploration Missions (2019)
    In:  CASI
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    Publication Date: 2019-07-31
    Description: When planning planetary rover missions it is useful to develop intuition and skills driving in, quite literally, alien environments before incurring the cost of reaching said locales. Simulators make it possible to operate in environments that have the physical characteristics of target locations without the expense and overhead of extensive physical tests. To that end, NASA Ames and Open Robotics collaborated on a Lunar rover driving simulator based on the open source Gazebo simulation platform and leveraging ROS (Robotic Operating System) components. The simulator was integrated with research and mission software for rover driving, system monitoring, and science instrument simulation to constitute an end-to-end Lunar mission simulation capability. Although we expect our simulator to be applicable to arbitrary Lunar regions, we designed to a reference mission of prospecting in polar regions. The harsh lighting and low illumination angles at the Lunar poles combine with the unique reflectance properties of Lunar regolith to present a challenging visual environment for both human and computer perception. Our simulator placed an emphasis on high fidelity visual simulation in order to produce synthetic imagery suitable for evaluating human rover drivers with navigation tasks, as well as providing test data for computer vision software development.In this paper, we describe the software used to construct the simulated Lunar environment and the components of the driving simulation. Our synthetic terrain generation software artificially increases the resolution of Lunar digital elevation maps by fractal synthesis and inserts craters and rocks based on Lunar size-frequency distribution models. We describe the necessary enhancements to import large scale, high resolution terrains into Gazebo, as well as our approach to modeling the visual environment of the Lunar surface. An overview of the mission software system is provided, along with how ROS was used to emulate flight software components that had not been developed yet. Finally, we discuss the effect of using the high-fidelity synthetic Lunar images for visual odometry. We also characterize the wheel slip model, and find some inconsistencies in the produced wheel slip behaviour.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN64600 , ARC-E-DAA-TN61930 , IEEE Aerospace Conference; Mar 02, 2019 - Mar 09, 2019; Big Sky, MT; United States
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    Understanding Martian Alteration Processes by Comparing In-Situ Chemical Measurements from Multiple Landing Sites (2019)
    In:  CASI
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    Publication Date: 2019-07-30
    Description: Characterizing the history of aqueous activity at the martian surface has been an objective of the Mars Exploration Rovers (MER) and the Mars Science Laboratory (MSL). Although the geologic context of the three landing sites are different, comparisons across the datasets can provide greater insight than using data from one mission alone. The Alpha Particle X-ray Spectrometer (APXS) is common to all three rovers (Spirit at Gusev crater, Opportunity at Meridiani Planum, and Curiosity at Gale crater) and provides a consistent basis for these comparisons. Soil and Dust: Fine grained basaltic soils and dust are remarkably uniform in chemical composition across multiple landing sites. These similarities in the concentrations of major, minor, and a few trace elements (Fig. 1) are indicative of planet-wide consistency in the composition of source materials for the soils. S and Cl vary by a factor of two in the soil and dust, but there is no clear association with any bulk cation (e.g., no correlation between S and total Ca, Mg, or Fe in soils). These volatile elements, however, are clearly associated with the nanophase-ferric iron component in the soil established by Mssbauer spectroscopy [1,2]. S and Cl likely originated as acidic species from volcanic out-gassing and subsequently coalesced on dust and sand grain surfaces, possibly with an affinity towards Fe3+ sites. Importantly, given the mobility of S and Cl in aqueous exposures, soil samples maintaining the typical molar S/Cl ratio of ~3.7:1 indicate minimal interactions with liquid water after the addition of S and Cl. In contrast to this well-established baseline, soil samples have been discovered at all three landing sites with atypical S/Cl ratios (e.g., subsurface soils), indicative of a more complex aqueous history.
    Keywords: Lunar and Planetary Science and Exploration
    Type: JSC-E-DAA-TN70395 , International Conference on Mars; Jul 22, 2019 - Jul 25, 2019; Pasadena, CA; United States
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    Common Probe Design Study and Follow-On Activities (2019)
    In:  CASI
    Details
    Publication Date: 2019-07-27
    Description: The Common Probe Study was funded by the NASA's Planetary Science Division in the Science Mission Directorate in 2018 to investigate the feasibility of a common aeroshell design for atmospheric probe missions at Venus, Jupiter, Saturn, Uranus, and Neptune. The study involved 4 NASA Centers: Ames Research Center, Goddard Space Flight Center, Langley Research Center, and the Jet Propulsion Laboratory. The common aeroshell design that was studied was a 400 kg, 1.5 m diameter, 45-degree sphere cone shape with a high density heatshield material (Heatshield for Extreme Entry Environments Technology, or HEEET) and a parachute system to extract the descent vehicle. This size of aeroshell could accommodate a descent vehicle of 0.75 m diameter, which could encompass both Tier 1 and Tier 2 science instruments at each of the 5 destinations. Study methodology: First, a notional payload of instruments for each destination was defined based on the top priority measurements indicated by the Planetary Science Decadal Survey. Steep and shallow entry flight path angles (EFPA) were defined for each planet based on qualification and operational g-load limits for current, state-of-the-art instruments. Interplanetary trajectories were then identified that bounded the EFPA range.Next, 3-DoF simulations for entry trajectories were run using the entry state vectors from the interplanetary trajectories. Conical ribbon parachutes were sized based on heatshield separation dynamics. Aero-heating correlations were used to generate stagnation point convective and radiative heat flux profiles. High fidelity thermal response models for various TPS materials were used to size stagnation point thicknesses, with margins based on previous studies. Backshell TPS masses were assumed based on scaled heat fluxes from the heatshield and also from previous mission concepts.Based on these analyses, we have found that the common design is applicable for atmospheric probe missions for 4 out of the 5 destinations. Because of the unique gravity well for Jupiter, the entry environments are more severe resulting in heat loads an order of magnitude higher than for the other destinations.The next step is to determine what follow-on activities NASA should engage in. A questionnaire for the atmospheric probe community has been developed, with a focus on what size of aeroshell should be further analyzed (smaller or same diameter), and what incentives would make using such an aeroshell, if assembled and available, desirable to mission proposers.Preliminary results from this questionnaire will be presented.
    Keywords: Lunar and Planetary Science and Exploration
    Type: ARC-E-DAA-TN65864 , Workshop on In Situ Exploration of the Ice Giants; Feb 25, 2019 - Feb 27, 2019; Marseille; France
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