DOI: 10.1002/2014GL061043
论文题名: The M<inf>w</inf> 6.5 offshore Northern California earthquake of 10 January 2010: Ordinary stress drop on a high-strength fault
作者: Wei M. ; McGuire J.J.
刊名: Geophysical Research Letters
ISSN: 0094-9769
EISSN: 1944-9500
出版年: 2014
卷: 41, 期: 18 起始页码: 6367
结束页码: 6373
语种: 英语
英文关键词: coseismic slip
; oceanic lithosphere
; postseismic slip
; sparse regularization
; strength envelope
; strike-slip earthquake
Scopus关键词: Drops
; Earthquakes
; Coseismic slips
; Oceanic lithosphere
; Postseismic slip
; Sparse regularizations
; Strength envelope
; Strike-slip earthquakes
; Faulting
; coseismic process
; deformation mechanism
; earthquake epicenter
; earthquake rupture
; failure mechanism
; GPS
; oceanic lithosphere
; strike-slip fault
; California
; United States
英文摘要: The 10 January 2010 Mw 6.5 earthquake offshore Northern California is one of the first intraplate earthquakes in oceanic lithosphere to be well captured by a GPS network. It presents an opportunity to evaluate rupture mechanics on a high-strength fault. Static inversion of the coseismic displacements shows that the slip peaks at the same depth as the expected strength envelope, where the differential stresses can be as high as 600 MPa. Laboratory experiments on peridotite predict dramatic dynamic weakening at these conditions. The observed ordinary stress drop, 2-20 MPa, may indicate that the lithosphere is much weaker than strength envelope predicts or that the failure mechanisms seen in the laboratory are not occurring during the rupture. The GPS observations show very little postseismic signal indicating that if a shear zone exists beneath the coseismic rupture, it operates at significantly greater stress levels than the coseismic stress change. Key Points Ordinary stress drop on a high-strength faultThe earthquake ruptured through the strongest portion of the lithosphereLack of postseismic deformation ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911191316&doi=10.1002%2f2014GL061043&partnerID=40&md5=f6d1a0883a55d6cd62abfdd39174ff7e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7033
Appears in Collections: 气候减缓与适应
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作者单位: Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, United States
Recommended Citation:
Wei M.,McGuire J.J.. The M<inf>w</inf> 6.5 offshore Northern California earthquake of 10 January 2010: Ordinary stress drop on a high-strength fault[J]. Geophysical Research Letters,2014-01-01,41(18).