globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2021.228998
论文题名:
The inferences on the Aegean geodynamic context from 30 October 2020 Samos earthquake (Mw:6.8)
作者: Över S.; Özden S.; Demirci A.; Gündoğdu E.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 815
语种: 英语
中文关键词: 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
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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170878
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Tectonophysics,2021-01-01,815
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