Gas and seismicity within the Istanbul seismic gap
Abstract Understanding micro-seismicity is a critical question for earthquake hazard assessment. Since the devastating earthquakes of Izmit and Duzce in 1999, the seismicity along the submerged section of North Anatolian Fault within the Sea of Marmara (comprising the “Istanbul seismic gap”) has bee...
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doaj-3fad837fa77144aba3a7a3dd9c47077a2020-12-08T04:45:14ZengNature Publishing GroupScientific Reports2045-23222018-05-018111110.1038/s41598-018-23536-7Gas and seismicity within the Istanbul seismic gapL. Géli0P. Henry1C. Grall2J.-B. Tary3A. Lomax4E. Batsi5V. Riboulot6E. Cros7C. Gürbüz8S. E. Işık9A. M. C. Sengör10X. Le Pichon11L. Ruffine12S. Dupré13Y. Thomas14D. Kalafat15G. Bayrakci16Q. Coutellier17T. Regnier18G. Westbrook19H. Saritas20G. Çifçi21M. N. Çağatay22M. S. Özeren23N. Görür24M. Tryon25M. Bohnhoff26L. Gasperini27F. Klingelhoefer28C. Scalabrin29J.-M. Augustin30D. Embriaco31G. Marinaro32F. Frugoni33S. Monna34G. Etiope35P. Favali36A. Bécel37Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)CEREGE, Aix Marseille Univ., CNRS, IRD, INRA, Coll. FranceCEREGE, Aix Marseille Univ., CNRS, IRD, INRA, Coll. FranceIfremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)ALomax ScientificIfremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Kandilli Observatory and Earthquake Research Institute, Boğaziçi UniversityKandilli Observatory and Earthquake Research Institute, Boğaziçi UniversityIstanbul Technical UniversityCEREGE, Aix Marseille Univ., CNRS, IRD, INRA, Coll. FranceIfremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Kandilli Observatory and Earthquake Research Institute, Boğaziçi UniversityIfremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Mineral Research & Exploration General Directorate, MTAInstitute for Marine Science and Technology, Dokuz Eyiul UniversitesiIstanbul Technical UniversityIstanbul Technical UniversityIstanbul Technical UniversityOcean and Earth Science, National Oceanography CentreHelmholtz-Centre Potsdam German Centre for Geosciences GFZ, Section 4.2 Geomechanics and RheologyInstitute of Marine Science, ISMAR-CNRIfremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Ifremer, Département Ressources Physiques et Ecosystèmes de fond de Mer (REM)Istituto Nazionale di Geofisica e Vulcanologia, INGVIstituto Nazionale di Geofisica e Vulcanologia, INGVIstituto Nazionale di Geofisica e Vulcanologia, INGVIstituto Nazionale di Geofisica e Vulcanologia, INGVIstituto Nazionale di Geofisica e Vulcanologia, INGVIstituto Nazionale di Geofisica e Vulcanologia, INGVLamont-Doherty Earth ObservatoryAbstract Understanding micro-seismicity is a critical question for earthquake hazard assessment. Since the devastating earthquakes of Izmit and Duzce in 1999, the seismicity along the submerged section of North Anatolian Fault within the Sea of Marmara (comprising the “Istanbul seismic gap”) has been extensively studied in order to infer its mechanical behaviour (creeping vs locked). So far, the seismicity has been interpreted only in terms of being tectonic-driven, although the Main Marmara Fault (MMF) is known to strike across multiple hydrocarbon gas sources. Here, we show that a large number of the aftershocks that followed the M 5.1 earthquake of July, 25th 2011 in the western Sea of Marmara, occurred within a zone of gas overpressuring in the 1.5–5 km depth range, from where pressurized gas is expected to migrate along the MMF, up to the surface sediment layers. Hence, gas-related processes should also be considered for a complete interpretation of the micro-seismicity (~M < 3) within the Istanbul offshore domain.https://doi.org/10.1038/s41598-018-23536-7 |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L. Géli P. Henry C. Grall J.-B. Tary A. Lomax E. Batsi V. Riboulot E. Cros C. Gürbüz S. E. Işık A. M. C. Sengör X. Le Pichon L. Ruffine S. Dupré Y. Thomas D. Kalafat G. Bayrakci Q. Coutellier T. Regnier G. Westbrook H. Saritas G. Çifçi M. N. Çağatay M. S. Özeren N. Görür M. Tryon M. Bohnhoff L. Gasperini F. Klingelhoefer C. Scalabrin J.-M. Augustin D. Embriaco G. Marinaro F. Frugoni S. Monna G. Etiope P. Favali A. Bécel |
spellingShingle |
L. Géli P. Henry C. Grall J.-B. Tary A. Lomax E. Batsi V. Riboulot E. Cros C. Gürbüz S. E. Işık A. M. C. Sengör X. Le Pichon L. Ruffine S. Dupré Y. Thomas D. Kalafat G. Bayrakci Q. Coutellier T. Regnier G. Westbrook H. Saritas G. Çifçi M. N. Çağatay M. S. Özeren N. Görür M. Tryon M. Bohnhoff L. Gasperini F. Klingelhoefer C. Scalabrin J.-M. Augustin D. Embriaco G. Marinaro F. Frugoni S. Monna G. Etiope P. Favali A. Bécel Gas and seismicity within the Istanbul seismic gap Scientific Reports |
author_facet |
L. Géli P. Henry C. Grall J.-B. Tary A. Lomax E. Batsi V. Riboulot E. Cros C. Gürbüz S. E. Işık A. M. C. Sengör X. Le Pichon L. Ruffine S. Dupré Y. Thomas D. Kalafat G. Bayrakci Q. Coutellier T. Regnier G. Westbrook H. Saritas G. Çifçi M. N. Çağatay M. S. Özeren N. Görür M. Tryon M. Bohnhoff L. Gasperini F. Klingelhoefer C. Scalabrin J.-M. Augustin D. Embriaco G. Marinaro F. Frugoni S. Monna G. Etiope P. Favali A. Bécel |
author_sort |
L. Géli |
title |
Gas and seismicity within the Istanbul seismic gap |
title_short |
Gas and seismicity within the Istanbul seismic gap |
title_full |
Gas and seismicity within the Istanbul seismic gap |
title_fullStr |
Gas and seismicity within the Istanbul seismic gap |
title_full_unstemmed |
Gas and seismicity within the Istanbul seismic gap |
title_sort |
gas and seismicity within the istanbul seismic gap |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2018-05-01 |
description |
Abstract Understanding micro-seismicity is a critical question for earthquake hazard assessment. Since the devastating earthquakes of Izmit and Duzce in 1999, the seismicity along the submerged section of North Anatolian Fault within the Sea of Marmara (comprising the “Istanbul seismic gap”) has been extensively studied in order to infer its mechanical behaviour (creeping vs locked). So far, the seismicity has been interpreted only in terms of being tectonic-driven, although the Main Marmara Fault (MMF) is known to strike across multiple hydrocarbon gas sources. Here, we show that a large number of the aftershocks that followed the M 5.1 earthquake of July, 25th 2011 in the western Sea of Marmara, occurred within a zone of gas overpressuring in the 1.5–5 km depth range, from where pressurized gas is expected to migrate along the MMF, up to the surface sediment layers. Hence, gas-related processes should also be considered for a complete interpretation of the micro-seismicity (~M < 3) within the Istanbul offshore domain. |
url |
https://doi.org/10.1038/s41598-018-23536-7 |
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