气候变化领域集成服务门户(CCPortal): Long-lived shallow slow-slip events on the Sunda megathrust

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DOI	10.1038/s41561-021-00727-y
	Long-lived shallow slow-slip events on the Sunda megathrust
	Mallick R.; Meltzner A.J.; Tsang L.L.H.; Lindsey E.O.; Feng L.; Hill E.M.
发表日期	2021
ISSN	17520894
起始页码	327
结束页码	333
卷号	14 期号:5
英文摘要	During most of the time between large earthquakes at tectonic plate boundaries, surface displacement time series are generally observed to be linear. This linear trend is interpreted as a result of steady stress accumulation at frictionally locked asperities on the fault interface. However, due to the short geodetic record, it is still unknown whether all interseismic periods show similar rates, and whether frictionally locked asperities remain stationary. Here we show that two consecutive interseismic periods at Simeulue Island, Indonesia experienced significantly different displacement rates, which cannot be explained by a sudden reorganization of locked and unlocked regions. Rather, these observations necessitate the occurrence of a 32-year slow-slip event on a shallow, frictionally stable area of the megathrust. We develop a self-consistent numerical model of such events driven by pore-fluid migration during the earthquake cycle. The resulting slow-slip events appear as abrupt velocity changes in geodetic time series. Due to their long-lived nature, we may be missing or mis-modelling these transient phenomena in a number of settings globally; we highlight one such ongoing example at Enggano Island, Indonesia. We provide a method for detecting these slow-slip events that will enable a substantial revision to the earthquake and tsunami hazard and risk for populations living close to these faults. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	displacement; earthquake event; fault slip; numerical model; slip; tectonic plate; tsunami; Aceh; Greater Sunda Islands; Indonesia; Simeulue; Sumatra; Sunda Isles
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/206933
作者单位	Asian School of the Environment, Nanyang Technological University, Singapore, Singapore; Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore; Université Côte d’Azur, CNRS, Observatoire de la Côte d’Azur, IRD, Géoazur, Campus CNRS, Sophia Antipolis, Valbonne, France; International Study Centre, University of Surrey, Guildford, United Kingdom; Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, United States
推荐引用方式 GB/T 7714	Mallick R.,Meltzner A.J.,Tsang L.L.H.,et al. Long-lived shallow slow-slip events on the Sunda megathrust[J],2021,14(5).
APA	Mallick R.,Meltzner A.J.,Tsang L.L.H.,Lindsey E.O.,Feng L.,&Hill E.M..(2021).Long-lived shallow slow-slip events on the Sunda megathrust.Nature Geoscience,14(5).
MLA	Mallick R.,et al."Long-lived shallow slow-slip events on the Sunda megathrust".Nature Geoscience 14.5(2021).