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Variation of Fault Creep Along the Overdue Istanbul-Marmara Seismic Gap in NW Turkey

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/persons/resource/dbecker

Becker,  Dirk
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GONAF, Deutsches GeoForschungsZentrum;

/persons/resource/patricia

Martinez Garzon,  P.
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GONAF, Deutsches GeoForschungsZentrum;

/persons/resource/wollin

Wollin,  Christopher
2.2 Geophysical Imaging of the Subsurface, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GONAF, Deutsches GeoForschungsZentrum;

Kılıç,  T.
External Organizations;
GONAF, Deutsches GeoForschungsZentrum;

/persons/resource/bohnhoff

Bohnhoff,  M.
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GONAF, Deutsches GeoForschungsZentrum;

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5014151.pdf
(Verlagsversion), 23MB

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Zitation

Becker, D., Martinez Garzon, P., Wollin, C., Kılıç, T., Bohnhoff, M. (2023): Variation of Fault Creep Along the Overdue Istanbul-Marmara Seismic Gap in NW Turkey. - Geophysical Research Letters, 50, 6, e2022GL101471.
https://doi.org/10.1029/2022GL101471


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5014151
Zusammenfassung
Strain energy from tectonic loading can be partly released through aseismic creep. Earthquake repeaters, repeatedly activated brittle fault patches surrounded by creep, indicate steady-state creep that affects the amount of seismic energy available for the next large earthquake along a plate contact. The offshore Main Marmara Fault (MMF) of the North Anatolian Fault Zone represents a seismic gap capable of generating a M > 7 earthquake in direct vicinity to the mega-city Istanbul. Based on a newly compiled seismicity catalog, we identify repeating earthquakes to resolve the spatial creep variability along the MMF during a 15-year period. We observe a maximum of seismic repeaters indicating creep along the central and western MMF segments tapering off toward the locked onshore Ganos fault in the west, and the locked offshore Princes Islands segment immediately south of Istanbul in the east. This indicates a high degree of spatial creep variability along the Istanbul-Marmara seismic gap.