气候变化领域集成服务门户(CCPortal): Slip rate deficit and earthquake potential on shallow megathrusts

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DOI	10.1038/s41561-021-00736-x
	Slip rate deficit and earthquake potential on shallow megathrusts
	Lindsey E.O.; Mallick R.; Hubbard J.A.; Bradley K.E.; Almeida R.V.; Moore J.D.P.; Bürgmann R.; Hill E.M.
发表日期	2021
ISSN	17520894
起始页码	321
结束页码	326
卷号	14 期号:5
英文摘要	Most destructive tsunamis are caused by seismic slip on the shallow part of offshore megathrusts. The likelihood of this behaviour is partly determined by the interseismic slip rate deficit, which is often assumed to be low based on frictional studies of shallow fault material. Here, we present a new method for inferring the slip rate deficit from geodetic data that accounts for the stress shadow cast by frictionally locked patches, and show that this approach greatly improves our offshore resolution. We apply this technique to the Cascadia and Japan Trench megathrusts and find that, wherever locked patches are present, the shallow fault generally has a slip rate deficit between 80 and 100% of the plate convergence rate, irrespective of its frictional properties. This finding rules out areas of low kinematic coupling at the trench considered by previous studies. If these areas of the shallow fault can slip seismically, the global tsunami hazard could be higher than currently recognized. Our method identifies critical locations where seafloor observations could yield information about frictional properties of these faults so as to better understand their slip behaviour. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	friction; geodetic network; plate convergence; seafloor; slip rate; thrust; tsunami; Japan Trench; Pacific Ocean; Cascadia
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206926
作者单位	Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, United States; Asian School of the Environment, Nanyang Technological University, Singapore, Singapore; School of Earth Sciences, Energy and Environment, Universidad Yachay Tech, Urcuquí, Ecuador; Institute of Geophysics, School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand; Department of Earth and Planetary Science, University of California Berkeley, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Lindsey E.O.,Mallick R.,Hubbard J.A.,et al. Slip rate deficit and earthquake potential on shallow megathrusts[J],2021,14(5).
APA	Lindsey E.O..,Mallick R..,Hubbard J.A..,Bradley K.E..,Almeida R.V..,...&Hill E.M..(2021).Slip rate deficit and earthquake potential on shallow megathrusts.Nature Geoscience,14(5).
MLA	Lindsey E.O.,et al."Slip rate deficit and earthquake potential on shallow megathrusts".Nature Geoscience 14.5(2021).