DOI: 10.1002/2015GL066101
论文题名: Complicated rupture process of the Mw 7.0 intraslab strike-slip earthquake in the Tohoku region on 10 July 2011 revealed by near-field pressure records
作者: Kubota T. ; Hino R. ; Inazu D. ; Ito Y. ; Iinuma T.
刊名: Geophysical Research Letters
ISSN: 0094-8402
EISSN: 1944-8133
出版年: 2015
卷: 42, 期: 22 起始页码: 9733
结束页码: 9739
语种: 英语
英文关键词: dtrike-slip earthquake
; fault modeling
; intraslab earthquake
; stress state
; The 2011 Tohoku-Oki earthquake
; tsunami
Scopus关键词: Earthquakes
; Faulting
; Geophysics
; Strike-slip faults
; Tsunamis
; 2011 Tohoku-Oki earthquakes
; Extensional stress
; Fault model
; Plate interfaces
; Source distribution
; Stress state
; Strike-slip earthquakes
; Tohoku-Oki earthquakes
; Fault slips
; aftershock
; bending
; dip
; earthquake magnitude
; earthquake rupture
; extensional tectonics
; seismic source
; slab
; stress field
; strike-slip fault
; Tohoku earthquake 2011
; tsunami
; Honshu
; Japan
; Japan Trench
; Pacific Ocean
; Tohoku
英文摘要: We examined fault models of the Tohoku strike-slip intraslab earthquake (Mw 7.0) on 10 July 2011 using near-field tsunami data. After constraining the strike and location of the fault from tsunami source distribution, we investigated fault models assuming simple rupture of one fault, and simultaneous rupture of two conjugate faults. The estimated single fault reached >30 km down into the slab from the plate interface, suggesting bending stress enhancement after the 2011 Tohoku-Oki earthquake, but the depth extent was inconsistent with the aftershock activity. The model involving conjugate faults extended ~20 km below the slab surface and was more consistent with the aftershocks. We concluded that it is more plausible that this earthquake involved two conjugate strike-slip faults, and the enhancement of the downdip extensional stress after Tohoku-Oki earthquake was not large enough to allow rupture to propagate deeply into the slab beneath the landward slope of the Japan Trench. Key Points An intraslab Tohoku strike-slip earthquake on July 2011 was studied with near-field pressure data Two orthogonal faults related to the downdip extensional stress were involved during the rupture Estimated stress change around the rupture area was smaller than that in the outer rise region. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956879024&doi=10.1002%2f2015GL066101&partnerID=40&md5=c78d3b52935a7378b34eea6c92d2f24c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8018
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Graduate School of Science, Tohoku University, Sendai, Japan
Recommended Citation:
Kubota T.,Hino R.,Inazu D.,et al. Complicated rupture process of the Mw 7.0 intraslab strike-slip earthquake in the Tohoku region on 10 July 2011 revealed by near-field pressure records[J]. Geophysical Research Letters,2015-01-01,42(22).