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dc.contributor.authorBulut, Fatih
dc.contributor.authorDogru, Asli
dc.contributor.authorYaltirak, Cenk
dc.contributor.authorYalvac, Sefa
dc.contributor.authorElge, Murat
dc.date.accessioned2021-11-09T19:49:40Z
dc.date.available2021-11-09T19:49:40Z
dc.date.issued2021
dc.identifier.issn1300-0985
dc.identifier.urihttps://doi.org/10.3906/yer-2102-18
dc.identifier.urihttps://hdl.handle.net/20.500.12440/4099
dc.description.abstractWe investigated rupture geometry, size, and slip distribution of October 30, 2020, Samos (Sisam)-Kusadasi earthquake combining seismographs, GPS measurements, and SAR analysis. Right after the earthquake, we measured 13 additional campaign-based GPS sites to intensify the available GPS network consisting of 10 continuous stations. We combined all available seismographs to have the best possible accuracy for mainshock and aftershock hypocenter locations. We compiled all available seismic profiles and integrated them using high-resolution bathymetry to map seismically active faults. The mainshock hypocenter is located at 37.913 +/- 0.009 N degrees and 26.768 +/- 0.017 E degrees and a depth of 12.3 +/- 1.7 km. Our fault plane solution shows that the mainshock has almost a pure normal-type mechanism. Based on accurate aftershock locations as well as InSAR results, the mainshock rupture is subsegmented with two north-dipping rupture planes. The rupture probably starts on a low angle plane generating 1.1 m average slip between the depths of 9-14 km. It merges to a steep plane at 9 km depth where it generates 1.2 m average slip extending towards the surface near the shoreline of Samos (Sisam) Island. Total size of the two rupture planes and their average slips determine that the magnitude of the mainshock is (M-w) 6.92 +/- 0.02. The mainshock has substantially increased Coulomb stress on several fault segments near the towns Kusadasa and Soke, which have the potentials to generate strong earthquakes. It also nonnegligibly increased Coulomb stress on several fault segments south of Izmir giving a warning for increased earthquake hazard in this highly inhabited area.en_US
dc.description.sponsorshipresearch project Slip deficit along Major Seismic Gaps in Turkey - Bogazici University [18T03SUP4]; Science Academy Turkeyen_US
dc.description.sponsorshipWe thank The General Directorate of Land Registry and Cadastre, and The General Directorate of Mapping and also Treecomp Company for GPS data. Turkish Office of Navigation, Hydrography and Oceanography is gratefully acknowledged for providing multibeam bathymetry data. Maps and graphs were generated using the GMT and MATLAB. The study was partially supported by the research project Slip deficit along Major Seismic Gaps in Turkey, which has been funded by Bogazici University (project number: 18T03SUP4). We thank Margarita Segou for the discussions on stress change modeling. We appreciate constructive comments by Editor Orhan Tatar, reviewer Serif Baris and the anonymous reviewer. Science Academy Turkey supported the study through Young Scientist Award (BAGEP), which has been given to Fatih Bulut in 2020.en_US
dc.language.isoengen_US
dc.publisherScientific Technical Research Council Turkey-Tubitaken_US
dc.relation.ispartofTurkish Journal of Earth Sciencesen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subject2020 Samos (Sisam)-Kupdasi earthquakeen_US
dc.subjectearthquake hazarden_US
dc.subjectearthquake source observationsen_US
dc.subjectseismicity and tectonicsen_US
dc.subjectGPSen_US
dc.subjectInSARen_US
dc.titleAnatomy of October 30, 2020, Samos (Sisam)-Kuqadasi earthquake (MW 6.92) and its influence on Aegean earthquake hazarden_US
dc.typearticleen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.description.wospublicationidWOS:000674701900001en_US
dc.description.scopuspublicationid2-s2.0-85111539978en_US
dc.departmentGümüşhane Üniversitesien_US
dc.authoridYALTIRAK, CENK / 0000-0003-1733-8000
dc.identifier.volume30en_US
dc.identifier.issue4en_US
dc.identifier.startpage425en_US
dc.identifier.doi10.3906/yer-2102-18
dc.identifier.endpage435en_US
dc.authorwosidYALTIRAK, CENK / O-8966-2014
dc.authorscopusid23093109300
dc.authorscopusid26025640800
dc.authorscopusid55987104400
dc.authorscopusid36161619100
dc.authorscopusid57226644253


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