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  • 1
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    Interpretation of potential field data - a generalized inverse approach (1977)
    In:  Geophys. Prosp., Basle, Wiley, vol. 25, no. B7, pp. 199-230, pp. 1264, (ISSN: 1340-4202)
    Details
    Publication Date: 1977
    Keywords: Inversion
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Inversion of borehole breakout orientation data (1991)
    In:  J. Geophys. Res., New York, Scientific American, vol. 96, no. 3, pp. 20093-20107, pp. B11404, (ISSN: 1340-4202)
    Details
    Publication Date: 1991
    Keywords: Borehole breakouts ; Borehole geophys. ; Inversion ; JGR
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Important findings expected from Europe's largest seismic array (1999)
    In:  Eos, Trans., Am. Geophys. Un., Stuttgart, Icelandic Meteorological Office, Ministry for the Environment,, vol. 80, no. 1, pp. 1 & 6, pp. L05602, (ISBN: 0534351875, 2nd edition)
    Details
    Publication Date: 1999
    Keywords: Seismology ; Tomography ; Trans-European suture zone (Tornquist-Teisseyre zone/line) ; EUROPROBE (Geol. and Geophys. in eastern Europe) ; receiver ; functions ; TOR ; Project report/description
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    Improved resolution of lower crustal electrical conductivity through measurements in deep boreholes (1993)
    Department of Geophysics, Uppsala University, Sweden
    In:  report, 16 pp., Aachen, Department of Geophysics, Uppsala University, Sweden, vol. 10, no. 11, pp. 429-433, (ISBN 3-933346-037)
    Details
    Publication Date: 1993
    Keywords: Geoelectrics ; Borehole geophys.
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Magnetotelluric signature for the Zagros collision (2014)
    Oxford University Press
    Details
    Publication Date: 2014-02-13
    Description: Zagros is a relatively young and active fold-thrust belt, which has formed due to convergence between the Eurasian and Arabian plates. Magnetotelluric (MT) soundings along a transect were carried out to determine the crustal structure in the collision zone of the two Palaeocontinents. MT data were analysed and modelled using 2-D inversion schemes. The models show clear conductive and resistive domains along the MT profile consistent to a great extent with documented tectonic features and surface geology. The models obtained from the joint inversion of transverse electric and transverse magnetic modes as well as the inversion of the determinant data show similar features along the profile. The new MT results reveal that the transition between two continents at the surface coincides with the western boundary of Sanandaj-Sirjan Zone (SSZ) at the Main Zagros Thrust (MZT). Along the profile towards northeast the conductors at top indicate massive Neogene sediments of the central domain (CD) while the very thick, shallow-located, resistive body (5–25 km thick and 100 km long) beneath is unlikely to be of oceanic affinity, but continental. Another main feature along the profile is the main resistive and conductive parts of the Arabian Plate, which coincide with the tectonic events of High Zagros Fault and Mountain Front Fault. Two highly conductive thick zones are recognized at the southwest part and in the middle of the profile apparently extending to a depth of about 50 km, possibly related to a downward smearing effect due to the presence of thick sedimentary columns in the upper crust. Along the profile, conductive features are recognized at the metamorphic SSZ and Urumieh-Dokhtar Magmatic Assemblage units as well as at CD. Below site 31 along the surface trace of the MZT, the transition between the two continents is distinguished by a complex sequence of conductive and resistive zones both varying laterally as well as vertically. The main difference between the two domains is that the Eurasian Plate seems to be more resistive than the Arabian Plate, although some part of the difference can be related to the thick sequence of conductive sedimentary rocks on the Arabian Plate.
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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  • 6
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    Interference effects of aircraft on earth's electromagnetic response at very low frequency and low frequency (2014)
    Wiley
    Details
    Publication Date: 2014-10-01
    Description: ABSTRACT Over the last few decades, very low frequency electromagnetics has been widely and successfully applied in mineral exploration and groundwater exploration. Many radio transmitters with strong signal-to-noise ratios are scattered in the very low frequency band and low frequency band. Based on experiences gained from ground measurements with the radio-magnetotelluric technique operating in the frequency interval 1–250 kHz, broadband magnetometers have been used to cover both very low frequency (3–30 kHz) and low frequency (30–300 kHz) bands to increase the resolution of the near-surface structure. The metallic aircraft as a conductive body will distort the magnetic signal to some extent, and thus it is important to investigate aircraft interference on the electromagnetic signal. We studied noise caused by rotation of an aircraft and the aircraft itself as a metallic conductive body with three methods: 3D wave polarization, determination of transmitter direction and full tipper estimation. Both very low frequency and low frequency bands were investigated. The results show that the magnetic field is independent of the aircraft at low frequencies in the very low frequency band and part of the low frequency band (below 100 kHz). At high frequencies (above 100 kHz), the signals are more greatly influenced by the aircraft, and the wave polarization directions are more scattered, as observed when the aircraft turned. Some aircraft generated noise mixed with radio transmitter signals, detected as ‘dummy’ signals by the 3D wave polarization method. The estimated scalar magnetic transfer functions are dependent on the aircraft flight directions at high frequencies, because of aircraft interference. The aircraft eigenresponse in the transfer functions (tippers) between vertical and horizontal magnetic field components was compensated for in the real part of the estimated tippers, but some unknown effect was still observed in the imaginary parts.
    Print ISSN: 0016-8025
    Electronic ISSN: 1365-2478
    Topics: Geosciences , Physics
    Published by Wiley
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  • 7
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    Interpreting magnetic data by integral moments (2008)
    Blackwell Publishing
    Details
    Publication Date: 2017-04-04
    Description: The use of the integral moments for interpreting magnetic data is based on a very elegant property of potential fields, but in the past it has not been completely exploited due to problems concerning real data. We describe a new 3-D development of previous 2-D results aimed at determining the magnetization direction, extending the calculation to second-order moments to recover the centre of mass of the magnetization distribution. The method is enhanced to reduce the effects of the regional field that often alters the first-order solutions. Moreover, we introduce an iterative correction to properly assess the errors coming from finite-size surveys or interaction with neighbouring anomalies, which are the most important causes of the failing of the method for real data. We test the method on some synthetic examples, and finally, we show the results obtained by analysing the aeromagnetic anomaly of the Monte Vulture volcano in Southern Italy.
    Description: Published
    Description: 815-824
    Description: 2.6. TTC - Laboratorio di gravimetria, magnetismo ed elettromagnetismo in aree attive
    Description: JCR Journal
    Description: reserved
    Keywords: magnetic anomalies ; 04. Solid Earth::04.02. Exploration geophysics::04.02.04. Magnetic and electrical methods ; 04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 8
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    Synthesis of geophysical data in the Bothnian Sea (1992)
    In:  EPIC3in: Meissner, R., Snyder, D., Balling, N. and Staroste, E. (eds.), The BABEL Project: First Status Report; Commission of the European Communities, Directorate-General XII, Brussels, pp. 59-64, ISBN: 2-87263-078-3
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
    Format: application/pdf
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  • 9
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    Archean and Early Proterozoic units around northern Gulf of Bothnia: Interpretation of wide-angle data from Sweden (1992)
    In:  EPIC3in: Meissner, R., Snyder, D., Balling, N. and Staroste, E. (eds.), The BABEL Project: First Status Report; Commission of the European Communities, Directorate-General XII, Brussels, pp. 47-50, ISBN: 2-87263-078-3
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
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  • 10
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    Collisional tectonics of the Baltic Shield in the northern Gulf of Bothnia from seismic data of the BABEL project (1995)
    In:  EPIC3Geophysical Journal International, 120, pp. 209-226
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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