Multi-fault rupture and successive triggering during the 2012 Mw 8.6   Sumatra offshore earthquake

doi:10.1029/2012GL053805

CORC > 北京大学 > 地球与空间科学学院

	Multi-fault rupture and successive triggering during the 2012 Mw 8.6 Sumatra offshore earthquake
	Zhang, Hao ; Chen, Jiawei ; Ge, Zengxi
刊名	geophysical research letters
	2012
关键词	STRESS TRANSFER PLATE DEFORMATION TECTONICS
DOI	10.1029/2012GL053805
英文摘要	On April 11, 2012 a Mw 8.6 strike-slip earthquake struck the northern Sumatra offshore region, and became the largest intraplate event ever recorded there. Preliminary study results show a remarkably complex rupture pattern, on a fault system manifested by north-south trending paleo-transform faults and east-west striking abyssal hill fabric. To image the rupture pattern of the earthquake, we back-projected teleseismic P wave recordings observed at three regional seismic networks (EU, AU, and F-net). Our results indicate that the earthquake ruptured on a conjugate fault system, composed of two subparallel WNW-ESE trending faults, and a NNE-SSW striking fault in between, for a duration of at least 120 s. The rupture started at the WNW end of the first WNW-ESE trending fault located at the east of the conjugate fault system, and propagated toward ESE. It then jumped to the second NNE-SSW trending fault located west of the first fault, and first extended SSWward and 15 s later NNEward. After its end on the second fault, the rupture jumped onto the third WNW-ESE trending fault and continued WNWward. The static Coulomb stress changes calculated from the rupture of the first and then the second faults, based on simplified uniform slip models, suggest that initiation of the rupture on the second fault could be statically and dynamically triggered by the first fault. However, the third fault was primarily dynamically triggered by S or even Love waves radiated from the southern branch of the second fault. Citation: Zhang, H., J. Chen, and Z. Ge (2012), Multi-fault rupture and successive triggering during the 2012 Mw 8.6 Sumatra offshore earthquake, Geophys. Res. Lett., 39, L22305, doi: 10.1029/2012GL053805.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000311841500003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; SCI(E); EI; 13; ARTICLE; 22; 39
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/155679]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhang, Hao,Chen, Jiawei,Ge, Zengxi. Multi-fault rupture and successive triggering during the 2012 Mw 8.6 Sumatra offshore earthquake[J]. geophysical research letters,2012.
APA	Zhang, Hao,Chen, Jiawei,&Ge, Zengxi.(2012).Multi-fault rupture and successive triggering during the 2012 Mw 8.6 Sumatra offshore earthquake.geophysical research letters.
MLA	Zhang, Hao,et al."Multi-fault rupture and successive triggering during the 2012 Mw 8.6 Sumatra offshore earthquake".geophysical research letters (2012).