气候变化领域集成服务门户(CCPortal): Earthquakes and tsunamis caused by low-angle normal faulting in the Banda Sea, Indonesia

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DOI	10.1038/s41561-020-0545-x
	Earthquakes and tsunamis caused by low-angle normal faulting in the Banda Sea, Indonesia
	Cummins P.R.; Pranantyo I.R.; Pownall J.M.; Griffin J.D.; Meilano I.; Zhao S.
发表日期	2020
ISSN	17520894
英文摘要	As the world’s largest archipelagic country in Earth’s most active tectonic region, Indonesia faces a substantial earthquake and tsunami threat. Understanding this threat is a challenge because of the complex tectonic environment, the paucity of observed data and the limited historical record. Here we combine information from recent studies of the geology of Indonesia’s Banda Sea with Global Positioning System observations of crustal motion and an analysis of historical large earthquakes and tsunamis there. We show that past destructive earthquakes were not caused by the supposed megathrust of the Banda outer arc as previously thought but are due to a vast submarine normal fault system recently discovered along the Banda inner arc. Instead of being generated by coseismic seafloor displacement, we find the tsunamis were more likely caused by earthquake-triggered submarine slumping along the fault’s massive scarp, the Weber Deep. This would make the Banda detachment representative not only as a modern analogue for terranes hyper-extended by slab rollback but also for the generation of earthquakes and tsunamis by a submarine extensional fault system. Our findings suggest that low-angle normal faults in the Banda Sea generate large earthquakes, which in turn can generate tsunamis due to earthquake-triggered slumping. © 2020, Crown.
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/124521
作者单位	Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia; Global Geophysics Research Group, Institut Teknologi Bandung, Bandung, Indonesia; Community Safety Branch, Geoscience Australia, Canberra, ACT, Australia; Department of Geography, Geology, and Environment, University of Hull, Hull, United Kingdom; Department of Geology, University of Otago, Dunedin, New Zealand; Geodesy Research Group, Faculty of Earth Science and Technology, Institut Teknologi Bandung, Bandung, Indonesia
推荐引用方式 GB/T 7714	Cummins P.R.,Pranantyo I.R.,Pownall J.M.,et al. Earthquakes and tsunamis caused by low-angle normal faulting in the Banda Sea, Indonesia[J],2020.
APA	Cummins P.R.,Pranantyo I.R.,Pownall J.M.,Griffin J.D.,Meilano I.,&Zhao S..(2020).Earthquakes and tsunamis caused by low-angle normal faulting in the Banda Sea, Indonesia.Nature Geoscience.
MLA	Cummins P.R.,et al."Earthquakes and tsunamis caused by low-angle normal faulting in the Banda Sea, Indonesia".Nature Geoscience (2020).