globalchange  > 气候变化与战略
DOI: 10.1038/s41561-021-00736-x
论文题名:
Slip rate deficit and earthquake potential on shallow megathrusts
作者: Lindsey E.O.; Mallick R.; Hubbard J.A.; Bradley K.E.; Almeida R.V.; Moore J.D.P.; Bürgmann R.; Hill E.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期:5
起始页码: 321
结束页码: 326
语种: 英语
英文关键词: friction ; geodetic network ; plate convergence ; seafloor ; slip rate ; thrust ; tsunami ; Japan Trench ; Pacific Ocean ; Cascadia
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169782
Appears in Collections:气候变化与战略

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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

Recommended Citation:
Lindsey E.O.,Mallick R.,Hubbard J.A.,et al. Slip rate deficit and earthquake potential on shallow megathrusts[J]. Nature Geoscience,2021-01-01,14(5)
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