气候变化领域集成服务门户(CCPortal): Statistical Analysis of the Preparatory Phase of the Mw 8.1 Iquique Earthquake, Chile

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DOI	10.1029/2019JB019337
	Statistical Analysis of the Preparatory Phase of the Mw 8.1 Iquique Earthquake, Chile
	Aden-Antóniow F.; Satriano C.; Bernard P.; Poiata N.; Aissaoui E.-M.; Vilotte J.-P.; Frank W.B.
发表日期	2020
ISSN	21699313
卷号	125 期号:6
英文摘要	The 2014 Iquique seismic crisis in Chile, culminating with a Mw 8.1 earthquake on 1 April, highlights a complex unlocking of the Northern Chilean subduction that has been considered a seismic gap since 1877. During the year preceding this event, at least three clusters of seismic activity have been reported: in July 2013 and January and March 2014. Recent studies have proposed large-scale slab deformation as a potential trigger for the megathrust earthquake, and these clusters possibly indicate aseismic slip transients accompanying the progressive destabilization of the plate contact. However, no evidence of gradual unlocking of the interface or transient deformation has yet been found in the seismicity rate. To address this question, we develop a dense earthquake catalog covering 15 months preceding the mainshock and derived from the continuous waveform data set recorded by the Integrated Plate Boundary Observatory Chile (IPOC) and Iquique Local Network (ILN) networks. After declustering the seismicity, a space-time analysis highlights a large-scale acceleration of the seismicity along the interface accompanied by a deceleration of intermediate-depth earthquakes. We demonstrate the existence of a seismic quiescence downdip of the mainshock rupture before the July 2013 cluster. We propose that this seismic quiescence potentially highlights fluid circulation and/or aseismic motion along upper-plate crustal fault(s). ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	declustering; Iquique earthquake preparatory phase; seismic quiescence; seismicity rate variations; statistical analysis
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187824
作者单位	Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Université de Paris, Institut de Physique du Globe de Paris, CNRS, UMR 7154, Paris, France; National Institute for Earth Physics, Magŭrele, Romania; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Aden-Antóniow F.,Satriano C.,Bernard P.,et al. Statistical Analysis of the Preparatory Phase of the Mw 8.1 Iquique Earthquake, Chile[J],2020,125(6).
APA	Aden-Antóniow F..,Satriano C..,Bernard P..,Poiata N..,Aissaoui E.-M..,...&Frank W.B..(2020).Statistical Analysis of the Preparatory Phase of the Mw 8.1 Iquique Earthquake, Chile.Journal of Geophysical Research: Solid Earth,125(6).
MLA	Aden-Antóniow F.,et al."Statistical Analysis of the Preparatory Phase of the Mw 8.1 Iquique Earthquake, Chile".Journal of Geophysical Research: Solid Earth 125.6(2020).