Seismotectonic implications of the 2020 Samos, Greece, Mw 7.0 mainshock based on high resolution aftershock relocation and source slip model

Karakostas, V.; Tan, O.; Kostoglou, A.; Papadimitriou, E.; Bonatis, P.

doi:10.1007/s11600-021-00580-y

Artykuł - szczegóły

Tytuł artykułu

Seismotectonic implications of the 2020 Samos, Greece, Mw 7.0 mainshock based on high resolution aftershock relocation and source slip model

Autorzy

Karakostas V. , Tan O. , Kostoglou A. , Papadimitriou E. , Bonatis P.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-021-00580-y

Warianty tytułu

Języki publikacji

Abstrakty

The 30 October 2020, Mw 7.0 Samos mainshock took place in the ofshore north of Samos Island in eastern Aegean area, previously struck in 1904 with a comparable magnitude earthquake ofshore the southern coastline. The investigation of the aftershock seismicity evolution and the properties of the activated fault network was accomplished with aftershock relocation performed with the double-diference and cross-correlation techniques. The highly accurate relocated seismicity illustrates a well-defned E–W activated structure located deeper than 5 km with an average depth of~12 km. Moment tensor solutions indicate mostly normal faulting with an average T-axis~ 185ο . Strong-motion waveform modeling revealed a N-dipping fault plane with a coseismic slip patch of 36 km × 22 km and a maximum slip equal to 1 m at 12 km depth. The slip is mainly concentrated in a single asperity implying a rupture mode of asperities breaking in isolated earthquakes rather than to cooperate to produce a larger rupture. Coulomb stress calculations unveil increased positive static stress changes values at the locations of the majority of the aftershocks and activation of minor fault segments by stress transfer.

Słowa kluczowe

stress transfer Samos Kusadasi Eastern Aegean Greece seismic sequence spatiotemporal properties variable slip model

przenoszenie naprężeń Samos Kusadasi wschodnie Morze Egejskie Grecja

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2021

Tom

Vol. 69, no. 3

Strony

979--996

Opis fizyczny

Bibliogr. 57 poz.

Twórcy

autor

Karakostas V.

vkarak@geo.auth.gr

Geophysics Department, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

https://orcid.org/0000-0003-4462-7094

autor

Tan O.

onur.tan@istanbul.edu.tr

Department of Geophysics, Seismology Section, Faculty of Engineering, Istanbul University – Cerrahpasa, Istanbul, Turkey

autor

Kostoglou A.

akostogl@geo.auth.gr

Geophysics Department, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

autor

Papadimitriou E.

ritsa@geo.auth.gr

Geophysics Department, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

autor

Bonatis P.

mponatis@geo.auth.gr

Geophysics Department, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

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Uwagi

Korekta artykułu w tym samym numerze, na stronie 997. Numer DOI korekty: 10.1007/s11600-021-00637-y

Typ dokumentu

Bibliografia

Identyfikator YADDA

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