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Journal Article

Interseismic strain build-up on the submarine North Anatolian Fault offshore Istanbul

Authors

Lange,  Dietrich
External Organizations;

Kopp,  Heidrun
External Organizations;

Royer,  Jean-Yves
External Organizations;

Henry,  Pierre
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Çakir,  Ziyadin
External Organizations;

Petersen,  Florian
External Organizations;

/persons/resource/psakicki

Sakic,  P.
1.1 Space Geodetic Techniques, 1.0 Geodesy, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Ballu,  Valerie
External Organizations;

Bialas,  Jörg
External Organizations;

Özeren,  Mehmet Sinan
External Organizations;

Ergintav,  Semih
External Organizations;

Géli,  Louis
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Fulltext (public)

4554896.pdf
(Publisher version), 7MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Lange, D., Kopp, H., Royer, J.-Y., Henry, P., Çakir, Z., Petersen, F., Sakic, P., Ballu, V., Bialas, J., Özeren, M. S., Ergintav, S., Géli, L. (2019): Interseismic strain build-up on the submarine North Anatolian Fault offshore Istanbul. - Nature Communications, 10, 3006.
https://doi.org/10.1038/s41467-019-11016-z


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_4554896
Abstract
Using offshore geodetic observations, we show that a segment of the North Anatolian Fault in the central Sea of Marmara is locked and therefore accumulating strain. The strain accumulation along this fault segment was previously extrapolated from onshore observations or inferred from the absence of seismicity, but both methods could not distinguish between fully locked or fully creeping fault behavior. A network of acoustic transponders measured crustal deformation with mm-precision on the seafloor for 2.5 years and did not detect any significant fault displacement. Absence of deformation together with sparse seismicity monitored by ocean bottom seismometers indicates complete fault locking to at least 3 km depth and presumably into the crystalline basement. The slip-deficit of at least 4 m since the last known rupture in 1766 is equivalent to an earthquake of magnitude 7.1 to 7.4 in the Sea of Marmara offshore metropolitan Istanbul.