气候变化领域集成服务门户(CCPortal): The inferences on the Aegean geodynamic context from 30 October 2020 Samos earthquake (Mw:6.8)

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DOI	10.1016/j.tecto.2021.228998
	The inferences on the Aegean geodynamic context from 30 October 2020 Samos earthquake (Mw:6.8)
	Över S.; Özden S.; Demirci A.; Gündoğdu E.
发表日期	2021
ISSN	00401951
卷号	815
英文摘要	On October 30, 2020, an earthquake with a magnitude of 6.8 (Mw) struck the northern coast of Samos Island in the Kuşadası Gulf. The solution to the focal mechanism indicates that the earthquake of 30 October 2020 occurred on a normal fault with nodal planes of E-W strike; thus, indicating extension in N-S direction. The fault plane solutions show a N-S trending extension for normal faults, which are obtained by inverting the moment tensor waveforms of 23 earthquakes and the P-wave first motion polarities of 11 aftershocks. A normal fault stress regime of approximately N-S (N6°E) σ3 axis is given by the inversion of slip vectors measured at sites located on land in Kuşadası. The mean R value is 0.84, suggesting that the stress regime is triaxial extensional stress state. The inversion of the focal mechanism of earthquakes occurring on land and in the Gulf of Kuşadası describes an extensional stress regime active today, characterized by an approximately N-S (N9°E) σ3 axis. The calculated R value of 0.31 indicates a triaxial stress state. For the 30 October 2020 earthquake (Mw:6.8), the Coulomb failure stress change analysis shows a substantial reduction in stress in the N-S direction supporting the kinematic results. The N-S extension in Western Anatolia-Aegean is largely influenced by the relatively fast movement of the Hellenic trench southwards, related to the sinking of the African plate beneath Aegean. © 2021
关键词	Earthquake Extension Kuşadası Gulf Normal Fault Samos Island
英文关键词	Fault slips; Seismic waves; Coulomb failure stress; Extensional stress; Fault plane solutions; Focal mechanism; Moment tensors; Substantial reduction; Tri-axial stress state; Western Anatolia; Earthquakes; African plate; aftershock; earthquake event; earthquake magnitude; fault plane; focal mechanism; moment tensor; normal fault; P-wave; Aegean Islands; Anatolia; Greece; Hellenic Trench; Mediterranean Sea; Northern Aegean; Samos; Turkey
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208045
作者单位	Iskenderun Technical University, Department of Civil Engineering, Iskenderun, 31200, Turkey; Çanakkale Onsekiz Mart University, Department of Geological Engineering, Çanakkale, 17100, Turkey; Çanakkale Onsekiz Mart University, Department of Geophysical Engineering, Çanakkale, 17100, Turkey; Çanakkale Onsekiz Mart University, Vocational College, Çan, Çanakkale, Turkey
推荐引用方式 GB/T 7714	Över S.,Özden S.,Demirci A.,et al. The inferences on the Aegean geodynamic context from 30 October 2020 Samos earthquake (Mw:6.8)[J],2021,815.
APA	Över S.,Özden S.,Demirci A.,&Gündoğdu E..(2021).The inferences on the Aegean geodynamic context from 30 October 2020 Samos earthquake (Mw:6.8).Tectonophysics,815.
MLA	Över S.,et al."The inferences on the Aegean geodynamic context from 30 October 2020 Samos earthquake (Mw:6.8)".Tectonophysics 815(2021).