气候变化领域集成服务门户(CCPortal): Seismic Stereometry Reveals Preparatory Behavior and Source Kinematics of Intermediate-Size Earthquakes

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DOI	10.1029/2020GL088563
	Seismic Stereometry Reveals Preparatory Behavior and Source Kinematics of Intermediate-Size Earthquakes
	Mordret A.; Brenguier F.; Causse M.; Boué P.; Voisin C.; Dumont I.; Vernon F.L.; Ampuero J.P.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:17
英文摘要	Although moderate-size earthquakes are poorly studied by lack of near-fault observations, they can provide key information about larger damaging earthquakes. Here we propose a new approach, inspired by double-difference relocation, that uses high-coherency waveforms recorded at neighboring sensors, to study the preparation phase and dynamics of moderate-size earthquakes. We validate this technique by analyzing the 2016, Mw5.2 Borrego Springs earthquake in Southern California and find consistent rupture velocities of 2 km/s highlighting two main rupture asperities. The analysis of the 2019, Ml5.2 Le Teil earthquake in France reveals slow nucleation at depth that migrates to the surface and propagates northward with a velocity of ∼2.8 km/s, highlighting two main rupture events also imaged by InSAR. By providing unprecedented resolution in our observation of the rupture dynamics, this approach will be useful in better understanding the preparation phase and rupture of both tectonic and induced earthquakes. ©2020. The Authors.
英文关键词	Earth sciences; Geophysics; Borrego springs; Double differences; Near fault; New approaches; Rupture velocities; Southern California; Wave forms; Earthquakes; earthquake event; earthquake rupture; fault zone; kinematics; satellite imagery; seismic data; synthetic aperture radar; waveform analysis; California; France; United States
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/169791
作者单位	Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, France; TOTAL CSTJF, Pau, France; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Université Côte d'Azur, IRD, Observatoire de la Côte d'Azur, CNRS, Géoazur, Valbonne, France
推荐引用方式 GB/T 7714	Mordret A.,Brenguier F.,Causse M.,et al. Seismic Stereometry Reveals Preparatory Behavior and Source Kinematics of Intermediate-Size Earthquakes[J],2020,47(17).
APA	Mordret A..,Brenguier F..,Causse M..,Boué P..,Voisin C..,...&Ampuero J.P..(2020).Seismic Stereometry Reveals Preparatory Behavior and Source Kinematics of Intermediate-Size Earthquakes.Geophysical Research Letters,47(17).
MLA	Mordret A.,et al."Seismic Stereometry Reveals Preparatory Behavior and Source Kinematics of Intermediate-Size Earthquakes".Geophysical Research Letters 47.17(2020).