气候变化领域集成服务门户(CCPortal): Evidence of supershear during the 2018 magnitude 7.5 Palu earthquake from space geodesy

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DOI	10.1038/s41561-018-0296-0
	Evidence of supershear during the 2018 magnitude 7.5 Palu earthquake from space geodesy
	Socquet A.; Hollingsworth J.; Pathier E.; Bouchon M.
发表日期	2019
ISSN	17520894
卷号	12 期号:3
英文摘要	A magnitude 7.5 earthquake hit the city of Palu in Sulawesi, Indonesia on 28 September 2018 at 10:02:43 (coordinated universal time). It was followed a few minutes later by a 4–7-m-high tsunami. Palu is situated in a narrow pull-apart basin surrounded by high mountains of up to 2,000 m altitude. This morphology has been created by a releasing bend in the Palu-Koro fault, a rapidly moving left-lateral strike-slip fault. Here we present observations derived from optical and radar satellite imagery that constrain the ground surface displacements associated with the earthquake in great detail. Mapping of the main rupture and associated secondary structures shows that the slip initiated on a structurally complex and previously unknown fault to the north, extended southwards over 180 km and passed through two major releasing bends. The 30 km section of the rupture south of Palu city is extremely linear, and slightly offset from the mapped geological fault at the surface. This part of the rupture accommodates a large and smooth surface slip of 4–7 m, with no shallow slip deficit. Almost no aftershock seismicity was recorded from this section of the fault. As these characteristics are similar to those from known supershear segments, we conclude that the Palu earthquake probably ruptured this segment at supershear velocities. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
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/124709
作者单位	Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, France
推荐引用方式 GB/T 7714	Socquet A.,Hollingsworth J.,Pathier E.,et al. Evidence of supershear during the 2018 magnitude 7.5 Palu earthquake from space geodesy[J],2019,12(3).
APA	Socquet A.,Hollingsworth J.,Pathier E.,&Bouchon M..(2019).Evidence of supershear during the 2018 magnitude 7.5 Palu earthquake from space geodesy.Nature Geoscience,12(3).
MLA	Socquet A.,et al."Evidence of supershear during the 2018 magnitude 7.5 Palu earthquake from space geodesy".Nature Geoscience 12.3(2019).