DOI: 10.1002/2015GL066361
论文题名: Static stress drop in the Mw 9 Tohoku-oki earthquake: Heterogeneous distribution and low average value
作者: Brown L. ; Wang K. ; Sun T.
刊名: Geophysical Research Letters
ISSN: 0094-8314
EISSN: 1944-8045
出版年: 2015
卷: 42, 期: 24 起始页码: 10595
结束页码: 10600
语种: 英语
英文关键词: great earthquakes
; Japan Trench
; stress drop
; subduction fault
; Tohoku-oki earthquake
Scopus关键词: Drops
; Earthquakes
; Faulting
; Geophysics
; Rigidity
; Tectonics
; Coseismic slips
; Great earthquake
; Heterogeneous distributions
; Large earthquakes
; Stress changes
; Stress drop
; Stress increase
; Tohoku-Oki earthquakes
; Stresses
; contour map
; coseismic process
; earthquake magnitude
; earthquake mechanism
; earthquake rupture
; fault zone
; heterogeneity
; rigidity
; slip
; spatial distribution
; static response
; stress change
; subduction zone
; Tohoku earthquake 2011
; Japan Trench
; Pacific Ocean
英文摘要: Static stress drop distribution and its average value over the rupture area contain important information on the mechanics of large earthquakes. Here we derive static stress drop distributions from 40 published rupture models for the 2011 Mw 9 Tohoku-oki earthquake that are based on various multidisciplinary observations. Average stress drop value over the fault area encompassed by the 5 m coseismic slip contour is not unusually large for each rupture model; the mean for the 40 models is 2.3 ± 1.3 MPa, assuming a uniform rigidity 40 GPa. The value for the entire rupture zone and with a more realistic rigidity structure will be even lower. In the majority of the models, local stress drop in parts of the rupture zone well exceeds 20 MPa. The heterogeneous stress change distribution, with large stress drop being accompanied by large stress increase, leads to the small average for the earthquake. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955195616&doi=10.1002%2f2015GL066361&partnerID=40&md5=66967208423f1bb190809057f4a4bdd4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7930
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: School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada
Recommended Citation:
Brown L.,Wang K.,Sun T.. Static stress drop in the Mw 9 Tohoku-oki earthquake: Heterogeneous distribution and low average value[J]. Geophysical Research Letters,2015-01-01,42(24).