Onset of aseismic creep on major strike-slip faults

Handle URI:
http://hdl.handle.net/10754/562357
Title:
Onset of aseismic creep on major strike-slip faults
Authors:
Çakir, Ziyadin; Ergintav, Semih; Özener, Haluk; Doǧan, Uǧur; Akoglu, Ahmet; Meghraoui, Mustapha; Reilinger, Robert E.
Abstract:
Time series analysis of spaceborne synthetic aperture radar (SAR) data, GPS measurements, and fi eld observations reveal that the central section of the Izmit (Turkey) fault that slipped with a supershear rupture velocity in the A.D. 1999, Mw7.4, Izmit earthquake began creeping aseismically following the earthquake. Rapid initial postseismic afterslip decayed logarithmically with time and appears to have reached a steady rate comparable to the preearthquake full fault-crossing rate, suggesting that it may continue for decades and possibly until late in the earthquake cycle. If confi rmed by future monitoring, these observations identify postseismic afterslip as a mechanism for initiating creep behavior along strike-slip faults. Long-term afterslip and/or creep has signifi cant implications for earthquake cycle models, recurrence intervals of large earthquakes, and accordingly, seismic hazard estimation along mature strike-slip faults, in particular for Istanbul which is believed to lie adjacent to a seismic gap along the North Anatolian fault in the Sea of Marmara. © 2012 Geological Society of America.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Publisher:
Geological Society of America
Journal:
Geology
Issue Date:
2-Oct-2012
DOI:
10.1130/G33522.1
Type:
Article
ISSN:
00917613
Sponsors:
InSAR data were provided by European Space Agency under Project AOTR-2436 and by the Geohazard Supersites program, and were processed at the TUBITAK ULAKBIM High Performance and Grid Computing Centre (Turkey). We thank Onur Tan and Aynur Dikbas for their field assistance, and Aral Okay, Roland Burgmann, and an anonymous reviewer for their helpful reviews. Reilinger's participation was supported by U.S. National Science Foundation grant EAR-1045487 to the Massachusetts Institute of Technology. This study is supported by TUBITAK project 107Y281.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorÇakir, Ziyadinen
dc.contributor.authorErgintav, Semihen
dc.contributor.authorÖzener, Haluken
dc.contributor.authorDoǧan, Uǧuren
dc.contributor.authorAkoglu, Ahmeten
dc.contributor.authorMeghraoui, Mustaphaen
dc.contributor.authorReilinger, Robert E.en
dc.date.accessioned2015-08-03T10:02:16Zen
dc.date.available2015-08-03T10:02:16Zen
dc.date.issued2012-10-02en
dc.identifier.issn00917613en
dc.identifier.doi10.1130/G33522.1en
dc.identifier.urihttp://hdl.handle.net/10754/562357en
dc.description.abstractTime series analysis of spaceborne synthetic aperture radar (SAR) data, GPS measurements, and fi eld observations reveal that the central section of the Izmit (Turkey) fault that slipped with a supershear rupture velocity in the A.D. 1999, Mw7.4, Izmit earthquake began creeping aseismically following the earthquake. Rapid initial postseismic afterslip decayed logarithmically with time and appears to have reached a steady rate comparable to the preearthquake full fault-crossing rate, suggesting that it may continue for decades and possibly until late in the earthquake cycle. If confi rmed by future monitoring, these observations identify postseismic afterslip as a mechanism for initiating creep behavior along strike-slip faults. Long-term afterslip and/or creep has signifi cant implications for earthquake cycle models, recurrence intervals of large earthquakes, and accordingly, seismic hazard estimation along mature strike-slip faults, in particular for Istanbul which is believed to lie adjacent to a seismic gap along the North Anatolian fault in the Sea of Marmara. © 2012 Geological Society of America.en
dc.description.sponsorshipInSAR data were provided by European Space Agency under Project AOTR-2436 and by the Geohazard Supersites program, and were processed at the TUBITAK ULAKBIM High Performance and Grid Computing Centre (Turkey). We thank Onur Tan and Aynur Dikbas for their field assistance, and Aral Okay, Roland Burgmann, and an anonymous reviewer for their helpful reviews. Reilinger's participation was supported by U.S. National Science Foundation grant EAR-1045487 to the Massachusetts Institute of Technology. This study is supported by TUBITAK project 107Y281.en
dc.publisherGeological Society of Americaen
dc.titleOnset of aseismic creep on major strike-slip faultsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalGeologyen
dc.contributor.institutionIstanbul Technical University, Department of Geology, 34469, Maslak, Istanbul, Turkeyen
dc.contributor.institutionTÜBITAK Marmara Research Center, Earth and Marine Sciences Institute, 41470, Gebze, Izmit, Turkeyen
dc.contributor.institutionBoǧaziçi University, Kandilli Observatory, 34680, Çengelköy, Istanbul, Turkeyen
dc.contributor.institutionYildiz Teknik University, Department of Geomatics, 34220, Esenler, Istanbul, Turkeyen
dc.contributor.institutionInstitut de Physique du Globe de Strasbourg (IPGS), UMR 7516, 5 rue René Descartes, 67084 Strasbourg, Franceen
dc.contributor.institutionMassachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 77 Massachusetts Avenue, Cambridge, MA 02139, United Statesen
kaust.authorAkoglu, Ahmeten
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