气候变化领域集成服务门户(CCPortal): The Preseismic and Postseismic Phases of the ∼700-km Deep M w7.9 Bonin Islands Earthquake; Japan

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DOI	10.1029/2019GL085589
	The Preseismic and Postseismic Phases of the ∼700-km Deep M w7.9 Bonin Islands Earthquake; Japan
	Gardonio B.; Schubnel A.; Das S.; Lyon-Caen H.; Marsan D.; Bouchon M.; Kato A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:1
英文摘要	The 30 May 2015 M w 7.9 Bonin Islands earthquake, Japan, is one of the largest deep-focus earthquakes ever recorded. Its occurrence, close to 700-km depth, in an area without any known historical seismicity, along with its magnitude, was a surprise to scientists. Deep earthquakes are generally believed to have few aftershocks and no foreshocks. Here, we explore the earthquake productivity in the hypocentral surroundings and detect 49 not previously identified earthquakes, 28 of which occurred during an accelerating preseismic phase that started 3 months prior to the main shock. This is the first time that such foreshock activity has been observed for a deep earthquake. The preseismic and postseismic activity suggests transformational faulting within a metastable olivine wedge (MOW) inside the slab at depth as the triggering principal mechanism for this deep earthquake sequence, the seismicity starting where the backward bending of the subducting Pacific plate is maximum. © 2019. American Geophysical Union. All Rights Reserved.
英文关键词	Faulting; Olivine; Deep-focus earthquakes; Foreshocks; Metastable olivine; Omori-decay; Subduction zones; Earthquakes; aftershock; earthquake event; earthquake hypocenter; faulting; foreshock; Pacific plate; seismicity; subduction zone; Bonin Islands; Honshu; Japan; Kanto; Tokyo [Kanto]
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170877
作者单位	Laboratoire de Géologie, Departement de Géosciences, École Normale Supérieure, CNRS UMR 8538, PSL Research University, Paris, France; Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; CNRS, IRD, ISTerre, Université Grenoble Alpes, Grenoble, France; Earthquake Research Institute, University of Tokyo, Bunkyo-ku, Tokyo, Japan
推荐引用方式 GB/T 7714	Gardonio B.,Schubnel A.,Das S.,et al. The Preseismic and Postseismic Phases of the ∼700-km Deep M w7.9 Bonin Islands Earthquake; Japan[J],2020,47(1).
APA	Gardonio B..,Schubnel A..,Das S..,Lyon-Caen H..,Marsan D..,...&Kato A..(2020).The Preseismic and Postseismic Phases of the ∼700-km Deep M w7.9 Bonin Islands Earthquake; Japan.Geophysical Research Letters,47(1).
MLA	Gardonio B.,et al."The Preseismic and Postseismic Phases of the ∼700-km Deep M w7.9 Bonin Islands Earthquake; Japan".Geophysical Research Letters 47.1(2020).