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  • 1
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    Multiparametric measurements of the 2021 Tajogaite eruption on La Palma, Canary Islands, Spain (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-21
    Description: Abstract
    Description: This data repository contains electrical and seismic tremor measurements, thermal infrared imagery, atmospheric conditions and information on plume heights that were recorded and collected during the 2021 Tajogaite eruption on La Palma, Canary Islands, Spain. The 2021 Tajogaite eruption lasted from 19 September until 13 December 2021. The "data description" file provides more detailed information on each dataset and the way the data is formatted. The electrical data was recorded using a Biral Thunderstorm Detector BTD-200. This sensor was installed at two consecutive locations: BTD1 (28.635°N, 17.876389°W) recorded from 11-26 October 2021 and BTD2 (28.602365°N, 17.880475°W) recorded from 27 October 2021 until the end of the eruption. The volcanic tremor measurements were recorded at seismic station PLPI (28.5722°N, 17.8654°W), which was operated by the Instituto Volcanológico de Canarias. Here we provide the seismic tremor amplitudes within the Very Long Period (0.4-0.6 Hz) and the Long Period (1-5 Hz) frequency bands between 10 September and 20 December 2021. Thermal infrared videography of the explosive volcanic activity was done using an InfraTec HD thermal infrared (TIR) video camera. This camera was installed in El Paso (28.649361°N, 17.882279°W) and recorded almost continuously between 3-8 November 2021. Here we provide individual thermal infrared frames. Atmospheric conditions were obtained from weather balloon measurements at Güímar (station nr. 60018) on Tenerife, which were provided by the University of Wyoming, Department of Atmospheric Science (http://weather.uwyo.edu/). In addition, atmospheric data was collected from ground-based weather stations at El Paso and Roque de los Muchachos, which were operated by the State Meteorological Agency (AEMET) of Spain on La Palma. Information on the volcanic plume heights was obtained from both the Toulouse Volcanic Ash Advisory Center (https://vaac.meteo.fr/volcanoes/la-palma/) as well as the Plan de Emergencias Volcánicas de Canarias.
    Keywords: Volcanic lightning ; Volcanic ash ; Biral Thunderstorm Detector ; Electrostatic measurements ; 2021 Tajogaite eruption ; Cumbre Vieja volcanic ridge ; La Palma ; Canary Islands ; Movement of charge ; Volcanic plume height ; Ice nucleation ; Lava fountaining ; Strombolian activity ; Ash emission ; Gas jetting ; Explosive volcanic activity ; Seismic tremor ; Thermal infrared rise diagram ; Isotherms ; Principal Component Analysis (PCA) ; Very Long Period (VLP) ; Long Period (LP) ; Balloons/Rockets 〉 RADIOSONDES ; EARTH SCIENCE 〉 ATMOSPHERE 〉 ATMOSPHERIC ELECTRICITY 〉 ELECTRIC FIELD ; EARTH SCIENCE 〉 ATMOSPHERE 〉 ATMOSPHERIC ELECTRICITY 〉 LIGHTNING ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 EARTHQUAKE MAGNITUDE/INTENSITY ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 EARTHQUAKE OCCURRENCES ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 VOLCANIC ACTIVITY 〉 ERUPTION DYNAMICS 〉 ASH/DUST DISPERSION ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 VOLCANIC ACTIVITY 〉 ERUPTION DYNAMICS 〉 VOLCANIC EXPLOSIVITY ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 VOLCANIC ACTIVITY 〉 VOLCANO MAGNITUDE/INTENSITY ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 VOLCANIC ACTIVITY 〉 VOLCANO PREDICTIONS ; EARTH SCIENCE 〉 SPECTRAL/ENGINEERING 〉 INFRARED WAVELENGTHS 〉 THERMAL INFRARED ; EARTH SCIENCE SERVICES 〉 ENVIRONMENTAL ADVISORIES 〉 GEOLOGICAL ADVISORIES 〉 VOLCANIC ACTIVITY ; EARTH SCIENCE SERVICES 〉 ENVIRONMENTAL ADVISORIES 〉 WEATHER/CLIMATE ADVISORIES 〉 DUST/ASH ADVISORIES ; EARTH SCIENCE SERVICES 〉 ENVIRONMENTAL ADVISORIES 〉 WEATHER/CLIMATE ADVISORIES 〉 PRESENT WEATHER ; geological process 〉 volcanism 〉 volcanic eruption ; hazard 〉 natural hazard ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 SEISMOLOGICAL STATIONS ; In Situ Land-based Platforms 〉 GEOPHYSICAL STATIONS/NETWORKS 〉 VOLCANO OBSERVATORY ; In Situ Land-based Platforms 〉 WEATHER STATIONS/NETWORKS 〉 METEOROLOGICAL STATIONS ; In Situ Land-based Platforms 〉 WEATHER STATIONS/NETWORKS 〉 WWLLN ; In Situ/Laboratory Instruments 〉 Electrical Meters ; In Situ/Laboratory Instruments 〉 Magnetic/Motion Sensors 〉 Seismometers 〉 SEISMOMETERS ; monitoring 〉 seismic monitoring ; physical process 〉 transport (physics) 〉 mass transport (physics) ; physical property 〉 electricity ; science 〉 natural science 〉 earth science 〉 geology 〉 volcanology ; science 〉 natural science 〉 earth science 〉 geophysics ; science 〉 physical science 〉 physics 〉 atmospheric physics
    Type: Dataset , Dataset
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  • 2
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    Geomagnetic Hpo index (2022)
    GFZ Data Services
    Details
    Publication Date: 2024-06-20
    Description: Abstract
    Description: This data publication includes the half-hourly Hp30 and ap30 indices as well as the hourly Hp60 and ap60 indices, collectively denoted as Hpo. This dataset is based on near real-time geomagnetic observatory data provided by 13 contributing observatories. It is derived and distributed by GFZ German Research Centre for Geosciences. When using the Hpo index, please cite this data publication as well as the accompanying publication Yamazaki et al. (submitted), which serves as documentation of the Hpo. The dataset is organised in yearly files, which, for the current year, are updated on a monthly basis. Typically, during the second week of a month, the data for the previous month is appended to the current year's file. The files are in ASCII files and start with header lines marked with # (hash). The Hpo index was developed within the H2020 project SWAMI (grant agreement No 776287) and is produced by Geomagnetic Observatory Niemegk, GFZ German Research Centre for Geosciences. It derives from the same 13 geomagnetic observatories that also contribute to the Kp index (Matzka et al., 2021, https://doi.org/10.5880/Kp.0001). They are listed as contributors to this data publication. With the introduction of the DOI for the Hpo index (Matzka et al, 2021, https://doi.org/10.5880/Hpo.0001), this DOI landing page and the associated HTTPS server linked to the DOI become the primary archive of Hpo (while the other established index distribution mechanisms at GFZ will be maintained in parallel). With the DOI, the dataset can grow with time, but a change of the data, once published, is not possible. If necessity arises in the future to correct already published values, then the corrected dataset will be published with a new DOI. Older DOIs and data sets will then still be available. For each DOI, an additional versioning mechanism will be available to document changes to the files such as header or format changes, which do not affect the integrity of the data. The DOI https://doi.org/10.5880/Hpo.0002 identifies the current version. A format description and a version history are provided in the data download folder.
    Description: Other
    Description: Version history: 2022-03-26 ---------- Publication of Version Hpo.0002. This version replaces version Hpo.0001. The Hpo, like the Kp nowcast, is based on the FMI algorithm (see Matzka et al., 2021, https://doi.org/10.1029/2020SW002641) and goes through a rescaling procedure to be more similar to the definitive Kp values. The data in version Hpo.0001 from 2018 onwards suffered from a slight error in this rescaling algorithm, causing for example somewhat too few Hpo 0 values and somewhat too many Hpo 0.333 values. This error was corrected for version Hpo.0002. The values from 1995 to 2017 are identical for both versions. 2021-04-26 ---------- Publication of Version Hpo.0001
    Keywords: Hpo ; Hpo index ; Hp30 ; ap30 ; Hp60 ; ap60 ; Kp ; Kp index ; ap index ; geomagnetism ; space weather ; space physics ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOMAGNETISM ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOMAGNETISM 〉 GEOMAGNETIC INDICES 〉 KP INDEX ; EARTH SCIENCE 〉 SUN-EARTH INTERACTIONS ; EARTH SCIENCE 〉 SUN-EARTH INTERACTIONS 〉 IONOSPHERE/MAGNETOSPHERE DYNAMICS 〉 AURORAE ; EARTH SCIENCE 〉 SUN-EARTH INTERACTIONS 〉 IONOSPHERE/MAGNETOSPHERE DYNAMICS 〉 GEOMAGNETIC INDICES ; EARTH SCIENCE 〉 SUN-EARTH INTERACTIONS 〉 IONOSPHERE/MAGNETOSPHERE DYNAMICS 〉 MAGNETIC FIELDS/MAGNETIC CURRENTS ; EARTH SCIENCE 〉 SUN-EARTH INTERACTIONS 〉 IONOSPHERE/MAGNETOSPHERE DYNAMICS 〉 MAGNETIC STORMS ; EARTH SCIENCE 〉 SUN-EARTH INTERACTIONS 〉 IONOSPHERE/MAGNETOSPHERE DYNAMICS 〉 SOLAR WIND
    Type: Dataset , Dataset
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  • 3
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    Operational Dataset about drilling in the Moodies Group of the Barberton Greenstone Belt (BASE – Barberton Archean Surface Environments) (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-20
    Description: Abstract
    Description: All datasets provided in the operational dataset (Heubeck et al., 2024) of the ICDP project BASE (ICDP 5069) consist of metadata, data and/or images. Here, a summary of explanations of the tables, data and images exported from the database of the project (mDIS BASE) are given and are complemented by additional information on data from measurements done in the laboratory prior to the sampling party. Finally, the sampling data from the first two sampling parties are added. Some basic definitions of identifiers used in ICDP, depths corrections and measurements are also introduced. The BASE (Barberton Archean Surface Environments) scientific drilling project focused on recovering unweathered continuous core through strata of the Paleoarchean Moodies Group (ca. 3.2 Ga), central Barberton Greenstone Belt (BGB), South Africa. They comprise some of the oldest well-preserved sedimentary strata on Earth, deposited within only a few million years in alluvial, fluvial, coastal-deltaic, tidal, and prodeltaic settings; they represent a very-high-resolution record of Paleoarchean surface conditions and processes. Moodies Group strata consist of polymict conglomerates, widespread quartzose, lithic and arkosic sandstones, siltstones, shales, and rare BIFs and jaspilites, interbedded with tuffs and several thin lavas. This report describes operations from preparations to the sampling workshop and complements the related scientific report. Eight inclined boreholes between 280 and 495 m length, drilled during November 2021 through July 2022, obtained a total of 2903 m of curated core of variable quality through steeply to subvertically dipping, in part overturned stratigraphic sections. All drilling objectives were reached. Boreholes encountered a variety of conglomerates, diverse and abundant, mostly tuffaceous sandstones, rhythmically laminated shale-siltstone and banded-iron formations, and several horizons of early-diagenetic sulfate concretions. Oxidative weathering reached far deeper than expected; fracturing was more intense, and BIFs and jaspilites were thicker than anticipated. Two km-long mine adits and a water tunnel, traversing four thick stratigraphic sections within the upper Moodies Group in the central BGB, were also sampled. All boreholes were logged by geophysical instruments. Core was processed (oriented, slabbed, photographed, described, and archived) in a large, publicly accessible hall in downtown Barberton. An exhibition provided background explanations for visitors and related the drilling objectives to the recently established Barberton-Makhonjwa Mountains World Heritage Site. A substantial education, outreach and publicity program addressed the information needs of the local population and of local and regional stakeholders.
    Keywords: Africa ; South Africa ; Barberton ; Early Life Ecology ; Greenstone Belt ; Moodies ; ocean and atmosphere ; oxygen ; ICDP ; International Continental Scientific Drilling Programme ; EARTH SCIENCE 〉 PALEOCLIMATE 〉 LAND RECORDS 〉 BOREHOLES ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOCHEMISTRY 〉 GEOCHEMICAL PROPERTIES ; Precambrian 〉 Archean
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  • 4
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    Geophysical Imaging of Deep EarthShape (GIDES): Seismic data of the Private Reserve Santa Gracia, Chile (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-18
    Description: Abstract
    Description: The dataset contains the seismic weight drop data acquired in Private Reserve Santa Gracia, Chile. The data acquisition was conducted as a part of the EarthShape project in the subproject of Geophysical Imaging of the Deep EarthShape (GIDES). The seismic line was setup to cut across an existing borehole location with core and geophysical logging data available (Krone et al., 2021; Weckmann et al., 2020). The data was acquired to image the deep weathering zone identified by the borehole data across the seismic profile. Included in the datasets are the raw data of the CUBE data logger, SEG-Y data of the recorded shots, and the shot and receiver geometry data. A vital aspect of comprehending the interplay between geological and biological processes lies in the imaging of the critical zone, located deep beneath the surface, where the transition from unaltered bedrock to fragmented regolith occurs. It had been hypothesized that the depth of such weathering zone is dependent on the climate condition of the area. A more humid climate with higher precipitation will result in a deeper weathering front. As a part of the EarthShape project (SPP-1803 ‘EarthShape: Earth Surface Shaping by Biota’), specifically the Geophysical Imaging of the Deep EarthShape (GIDES - Grant No. KR 2073/5-1), we aim to image the weathering zone using the geophysical approach. Using the seismic method, we can differentiate different weathered layers based on the seismic velocity while also providing a 2D subsurface image of the critical zone. We conducted a seismic weight drop experiment in the Private Reserve Santa Gracia, Chile, to observe the depth of the weathering zone in a semi-arid climate and compare the resulting model with existing borehole data (Krone et al., 2021; Weckmann et al., 2020). The acquired data can then be used for multiple seismic imaging techniques, including body wave tomography and multichannel analysis of surface waves.
    Description: Other
    Description: The DFG Priority Program 1803 "EarthShape - Earth Surface Shaping by Biota" (2016-2022; https://www.earthshape.net/) explored between scientific disciplines and includes geoscientists and biologists to study from different viewpoints the complex question how microorganisms, animals, and plants influence the shape and development of the Earth’s surface over time scales from the present-day to the young geologic past. All study sites are located in the north-to-south trending Coastal Cordillera mountains of Chile, South America. These sites span from the Atacama Desert in the north to the Araucaria forests approximately 1300 km to the south. The site selection contains a large ecological and climate gradient ranging from very dry to humid climate conditions.
    Keywords: Geophysics ; seismic ; weight drop ; weathering zone ; critical zone ; bedrock ; granite ; passive seismic ; 3C sensor ; EarthShape ; Chile ; Coastal Cordillera ; Private Reserve Santa Gracia ; CONTROLLED_SOURCE_SEISMOLOGY 〉 REFRACTION ; CONTROLLED_SOURCE_SEISMOLOGY 〉 WEIGHT-DROP_SOURCE ; CONTROLLED_SOURCE_SEISMOLOGY 〉 NEAR_SURFACE ; PASSIVE_SEISMIC 〉 STATIONS ; SENSOR 〉 GEOPHONE ; SENSOR 〉 3-C ; LAND ; SEG-Y_DATA_FORMAT ; MINISEED_DATA_FORMAT ; CONTROLLED_SOURCE_SEISMOLOGY 〉 RAW_DATA ; CONTROLLED_SOURCE_SEISMOLOGY 〉 VERTICALLY_STACKED_DATA ; EARTH SCIENCE 〉 SOLID EARTH ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 SEISMIC PROFILE
    Type: Dataset , Dataset
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  • 5
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    The SeisComP seismological software package (2008)
    GFZ Data Services
    Details
    Publication Date: 2024-06-14
    Description: Abstract
    Description: SeisComP is a seismological software for data acquisition, processing, distribution and interactive analysis. The seismological software package has evolved within a decade from pure acquisition modules to a fully featured real-time earthquake monitoring software. The SeedLink protocol for seismic data transmission has been the core of SeisComP from the very beginning. Later additions included simple, purely automatic event detection, location and magnitude determination capabilities. Especially within the development of the 3rd-generation SeisComP, also known as SeisComP3 automatic processing capabilities have been augmented by graphical user interfaces (GUIs) for visualization, rapid event review and quality control.Communication between the modules is achieved using a dedicated messaging system that allows distributed computing and remote review. For seismological metadata exchange export/import tools to/from QuakeML and FDSN StationXML are available, which also provide convenient interfaces with 3rd-party software. The initial SeisComP3 development took place at GFZ between 2006 and 2008 within the GITEWS project (German Indonesian Tsunami Early Warning System) and continued with increasing engagement of gempa GmbH, a software company established by the initial development team of the GFZ.
    Keywords: real-time ; data ; processing ; earthquakes ; monitoring ; fdsn ; standards ; seismology ; C++ ; python ; AGPL ; open ; EARTH SCIENCE SERVICES 〉 DATA ANALYSIS AND VISUALIZATION ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; EARTH SCIENCE
    Language: English
    Type: Software
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  • 6
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    Land seismic data of the ALPHA amphibious controlled source experiment - Datasets (2017)
    GFZ Data Services
    Details
    Publication Date: 2024-06-13
    Description: Abstract
    Description: Raw-, SEG-Y and other supplementary data of the landside deployment from the amphibious wide-angle seismic experiment ALPHA are presented. The aim of this project was to reveal the crustal and lithospheric structure of the subducting Adriatic plate and the external accretionary wedge in the southern Dinarides. Airgun shots from the RV Meteor were recorded along two profiles across Montenegro and northern Albania.
    Keywords: Seismology ; Adriatic Plate ; Montenegro ; Albania ; CONTROLLED_SOURCE_SEISMOLOGY 〉 REFRACTION ; CONTROLLED_SOURCE_SEISMOLOGY 〉 WIDE-ANGLE_REFLECTION_REFRACTION ; CONTROLLED_SOURCE_SEISMOLOGY 〉 AIRGUN_SOURCE ; CONTROLLED_SOURCE_SEISMOLOGY 〉 REGIONAL_SCALE ; CONTROLLED_SOURCE_SEISMOLOGY 〉 DSS ; SENSOR 〉 GEOPHONE ; SENSOR 〉 3-C ; AMPHIBIOUS ; MINISEED_DATA_FORMAT ; SEISMIC_WAVEFORM_DATA ; CONTROLLED_SOURCE_SEISMOLOGY 〉 RAW_DATA ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES 〉 SEISMIC PROFILE ; In Situ/Laboratory Instruments 〉 Profilers/Sounders 〉 SEISMIC REFLECTION PROFILERS
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  • 7
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    PRESSurE River Chemistry Time Series (Nepal) (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-12
    Description: Abstract
    Description: River water and suspended sediment samples were collected between 2015 and 2018 from the Narayani, Saptakoshi and Sunkoshi rivers in Nepal. Samples formed part of the Perturbations of Earth Surface Processes by Large Earthquakes PRESSurE Project (https://www.gfz-potsdam.de/en/section/geomorphology/projects/pressure/). This project aims to better understand the role of earthquakes on earth surface processes. Hydrological stations were installed on the rivers draining the epicentral area following the April 2015 Gorkha earthquake (Mw 7.9). The stations were operated for four consecutive monsoon seasons. All stations were equipped with river stage height measurements and manned daily for sampling. A small batch of river water samples were also collected from the Narayani River. These samples were collected upstream of Narayanghat using a raft between 2015 and 2017. These samples were collected at varying depths in the river. Dissolved river water ion concentrations (N=672) and sediment-adsorbed cation concentrations (N=74) were determined. Radiogenic strontium isotopes (87Sr/86Sr) of both phases were measured for a small number of paired samples (N=9). Dissolved river water anion concentrations were measured at the GFZ German Research Centre for Geosciences, Potsdam, Germany. Dissolved river water cation concentrations were measured at GFZ German Research Centre for Geosciences, Potsdam, Germany and the Department of Earth Sciences, University of Cambridge, Cambridge, UK. Sediment-adsorbed cation concentrations and radiogenic strontium isotope ratios were measured at the Department of Earth Sciences, University of Cambridge, Cambridge, UK.
    Description: Other
    Description: This data set forms part of the Perturbations of Earth Surface Processes by Large Earthquakes PRESSurE Project (https://www.gfz-potsdam.de/en/section/geomorphology/projects/pressure/). Strong earthquakes cause transient perturbations to the near Earth’s surface system. These include widespread land-sliding, subsequent mass movement, and the loading of rivers with sediments. In addition, brittle-rock deformation occurs during the event, forming cracks that affect rock strength and hydrological conductivity. Often overlooked in the immediate aftermath of an earthquake, these perturbations can represent a major part of the overall disaster with impacts that can persist for years before restoring to background conditions. This relaxation phase is therefore part of seismically induced earthquake changes and needs to be monitored to understand the full impact on the Earth system. The fundamental questions motivating the PRESSurE project are ‘How do earthquakes impact erosion during and following seismic activity?’ and ‘What is the role of earthquakes on Himalayan landscape evolution?’. In early June, shortly after the April 2015 Gorkha earthquake, we installed twelve hydrological stations covering all rivers draining the epicentral area. Each station was equipped for daily river water and suspended sediment sampling. Samples are filtered and packed in Nepal, before being shipped to the sediment lab at GFZ for further analysis (SedLab: https://labinfrastructure.geo-x.net/laboratories/91). The sampling network is complemented by an array of seismometers, repeated satellite image observations, and on-side stage high recording. This array is optimized for the monitoring of Earth surface processes (land-sliding, mass wasting and debris flows) and for the monitoring of properties of the shallow subsurface by coda analysis. The monitoring network is the first and most complete observatory to monitor the perturbation of Earth surface process by a major earthquake.
    Type: Collection , Collection
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  • 8
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    Seismic data, seismic crustal velocity and anisotropy models for Sri Lanka (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-12
    Description: Abstract
    Description: The data present the intermediate to final results when we introduce a two-step fully Bayesian approach with coupled uncertainty propagation for estimating crustal isotropic and radial anisotropy models using Rayleigh and Love dispersion data along with receiver functions in Sri Lanka. In the first step, 2D surface wave tomography is used to generate period-wise ambient noise phase velocity maps for Rayleigh and Love waves along with their associated uncertainties. Here we provide the inter-station dispersion data (folder: 2024-003_1_Ke-et-al_interstation_surface_ dispersion_curves; ASCII) for the 2D surface wave tomography process, along with the results of the tomography, including the velocity maps (folder: 2024-003_Ke-et-al_2_velocity_map; ASCII). In addition, the results (folder: 2024-003_3_Ke-et-al_2Dmcmc_inversion_results) are available in MAT format, along with a MATLAB script to allow users to extract the data independently. In a second step, local surface wave dispersion and model errors are derived from the velocity maps. The surface wave dispersion receiver functions are jointly inverted to obtain the isotropic mean shear wave and radial anisotropy profiles as a function of depth at each station site. The input data (folder: 2024-003_Ke-et-al_4_inv_data; ASCII) of surface dispersion and receiver function for the inversion are presented here, as well as the final result model from the inversion (folder: 2024-003_Ke-et-al_5_model; ASCII and .dat formats).
    Keywords: seismic crustal structure ; Bayesian joint inversion ; seismic ambient noise ; receiver functions ; radial anisotropy ; Bayesian joint inversion ; seismic ambient noise ; receiver functions ; EARTH SCIENCE 〉 SOLID EARTH 〉 TECTONICS 〉 EARTHQUAKES ; EARTH SCIENCE SERVICES 〉 MODELS 〉 GEOLOGIC/TECTONIC/PALEOCLIMATE MODELS ; science 〉 natural science 〉 earth science 〉 geophysics
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  • 9
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    PRESSurE suspended sediment data time series, Gorkha earthquake, Nepal (2024)
    GFZ Data Services
    Details
    Publication Date: 2024-06-12
    Description: Abstract
    Description: This data set was taken within the Perturbations of Earth Surface Processes by Large Earthquakes PRESSurE Project (https://www.gfz-potsdam.de/en/section/geomorphology/projects/pressure/), Hazard and Risk Team (HART) project by the German Center for Geosciences GFZ Potsdam. This project aims to better understand the role of earthquakes on earth surface processes. Strong earthquakes cause transient perturbations of the near Earth’s surface system. These include the widespread landsliding and subsequent mass movement and the loading of rivers with sediments. In addition, rock mass is shattered during the event, forming cracks that affect rock strength and hydrological conductivity. Often overlooked in the immediate aftermath of an earthquake, these perturbations can represent a major part of the overall disaster with an impact that can last for years before restoring to background conditions. Thus, the relaxation phase is part of the seismical-ly induced change by an earthquake and needs to be monitored in order to understand the full impact of earthquakes on the Earth system. Following the April 2015 Mw 7.9 Gorkha earthquake, 6 hydrological stations were installed on the Buri Gandaki, Trisuli, Bhotekoshi, Sunkoshi, Koshi and Kahole Khola rivers, draining the epicentral area. The stations were operated for 4 monsoon sea-sons from May/June 2015 to October 2018. The stations were equipped with river stage height measurements and manned daily river sampling for suspended river sediments and water geo-chemistry. In this data publication we present the data from the small head water catchment Ka-hule Khole (see also Andermann et al. 2021, https://doi.org/10.5880/GFZ.4.6.2021.003). Bhotekoshi at Barabise, Sunkoshi at Khurkot and Koshi at Chatara. The samples were filtered at the sampling location and analyzed at the GFZ Potsdam SedLab, section 4.6 Geomorphology, for suspended sed-iment concentration and grainsize distribution. A small sample batch of suspended sediment concentrations was published already in Cook et al. 2018. The samples BA_01.07.2016 – BA_25.07.2016 have been published in this manuscript in figure 4. This data publication contains 920 suspended sediment measurements and respective grainsize distributions. List after station: Kahule Khola 230 samples, Bhotekoshi 282, Sunkoshi 189, and Sapta Koshi 219 samples.
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  • 10
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    Global distribution and composition of Neogene-Quaternary intraplate volcanic rocks (2022)
    GFZ Data Services
    Details
    Publication Date: 2024-06-10
    Description: Abstract
    Description: Global database of  〉20, 000 geochemical analyses of Neogene-Quaternary intraplate volcanic rocks. The database collates major, trace element and Sr-Nd-Pb isotopic data for whole-rock samples 〈20 Ma old that were published between 1990 and 2020. Database as published in Ball et al. (2021). Key publication: Ball, P. W., White, N. J., Maclennan, J., & Stephenson, S. N. (2021). Global influence of mantle temperature and plate thickness on intraplate volcanism. Nature Communications, 12(1), 2045. https://doi.org/10.1038/s41467-021-22323-9
    Description: Other
    Description: The DIGIS geochemical data repository is a research data repository in the Earth Sciences domain with a specific focus on geochemical data. It is hosted at GFZ Data Services through a collaboration between the Digital Geochemical Data Infrastructure (DIGIS) for GEOROC 2.0 (https://digis.geo.uni-goettingen.de) and the GFZ German Research Centre for Geosciences. The repository archives, publishes and makes accessible user-contributed, peer-reviewed research data that fall within the scope of the GEOROC database. Compilations of previously published data are also made available on the GEOROC website (https://georoc.eu) as Expert Datasets.
    Keywords: intraplate ; volcanic ; major elements ; trace elements ; Sr87_Sr86 ; Nd143_Nd144 ; Pb206_Pb204 ; Pb207_Pb206 ; Pb208_Pb204 ; andesite ; basalt ; basaltic andesite ; basaltic trachyandesite ; basanite ; dacite ; foidite ; phonolite ; phonotephrite ; picrobasalt ; rhyolite ; tephriphonolite ; trachyandesite ; trachybasalt ; trachyte ; Sr-Nd-Pb isotopes ; GEOROC Expert Dataset ; EARTH SCIENCE 〉 SOLID EARTH 〉 GEOCHEMISTRY ; Phanerozoic 〉 Cenozoic 〉 Neogene ; Phanerozoic 〉 Cenozoic 〉 Quaternary
    Type: Dataset , Dataset
    Location Call Number Expected Availability
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