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Homogenized regional seismicity catalogue for the Marmara region, northwestern Turkey, for the time interval 2021-2023

Authors
/persons/resource/dbecker

Becker,  Dirk
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;

/persons/resource/patricia

Martinez Garzon,  P.
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;

Tugbay,  Kiliç
External Organizations;

/persons/resource/bohnhoff

Bohnhoff,  M.
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;

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Citation

Becker, D., Martinez Garzon, P., Tugbay, K., Bohnhoff, M. (2025): Homogenized regional seismicity catalogue for the Marmara region, northwestern Turkey, for the time interval 2021-2023.
https://doi.org/10.5880/GFZ.ITSJ.2025.003


Cite as: https://gfzpublic.gfz.de/pubman/item/item_5037534
Abstract
The dataset is an extended and updated version of the homogenized regional earthquake catalogue of the Marmara region, north-western Turkey, presented in Wollin et al. (2018) and Becker et al. (2023). It is built on the regional Turkish seismicity catalogues provided by AFAD (Disaster and Emergency Management Presidency of Turkey) and KOERI (Kandilli Observatory and Earthquake Research Institute) and spans the time interval 2021-2023. All events available in these two catalogues in the wider Marmara region were combined and duplicate events removed. A total of 2242 events having at least 6 P- and/or S-picks were located using the NLLoc software (Lomax et al., 2000, 2009) in Octtree mode utilizing automatic picks obtained with the PhaseNet algorithm (Zhu & Beroza, 2019) for all available waveforms. The magnitude range is between M0.5 and M5.1 and covers mainly the area 40.00S-41.25S and 27.00E-30.00E which was used as search region for the regional catalogs. The full description of the data and methods is provided in the data description file.