气候变化领域集成服务门户(CCPortal): Orthogonal Fault Rupture and Rapid Postseismic Deformation Following 2019 Ridgecrest; California; Earthquake Sequence Revealed From Geodetic Observations

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DOI	10.1029/2019GL086888
	Orthogonal Fault Rupture and Rapid Postseismic Deformation Following 2019 Ridgecrest; California; Earthquake Sequence Revealed From Geodetic Observations
	Feng W.; Samsonov S.; Qiu Q.; Wang Y.; Zhang P.; Li T.; Zheng W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:5
英文摘要	We studied the 2019 Mw6.4 and Mw7.1 Ridgecrest, California, earthquake sequence, using Sentinel-1 and ALOS-2 coseismic interferograms and subpixel offsets to retrieve the three-dimensional (3-D) surface displacements. By inverting the 3-D displacements, optimal dip angles of the earthquake faults and the slip model were obtained. The interferometric synthetic aperture radar-based slip model supplemented with the analysis of GPS data shows that the Mw6.4 event ruptured two orthogonal faults and its major geodetic moment was released by sinistral motion on a NE-SW trending fault that dips 78° NW. Right-lateral slip on NW-SE trending subvertical faults was responsible for the Mw7.1 earthquake. Postseismic analysis with U.S. Geological Survey earthquake catalog and GPS time series at site P595 shows that the postseismic surface deformation following the Mw7.1 event has similar temporal patterns with the postseismic moment release, but requires more energy. This implies that the early aftershocks were likely controlled by rapid afterslip following the mainshock. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Capillary flow; Deformation; Earthquakes; Geodesy; Geodetic satellites; Interferometry; Synthetic aperture radar; Time series analysis; 3-D displacement; afterslip; Co-seismic interferograms; Fault ruptures; Interferometric synthetic aperture radars; rapid postseismic release; Similar temporal patterns; U.s. geological surveys; Fault slips; ALOS; deformation mechanism; earthquake catalogue; earthquake event; earthquake rupture; GPS; interferometry; modeling; Sentinel; synthetic aperture radar; three-dimensional modeling; California; 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/170598
作者单位	Guangdong Provincial Key Laboratory of Geodynamics and Geohazards, School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China; Canada Center for Mapping and Earth Observations, Natural Resources Canada, Ottawa, ON, Canada; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States; Institute of Geology, China Earthquake Administration, Beijing, China
推荐引用方式 GB/T 7714	Feng W.,Samsonov S.,Qiu Q.,et al. Orthogonal Fault Rupture and Rapid Postseismic Deformation Following 2019 Ridgecrest; California; Earthquake Sequence Revealed From Geodetic Observations[J],2020,47(5).
APA	Feng W..,Samsonov S..,Qiu Q..,Wang Y..,Zhang P..,...&Zheng W..(2020).Orthogonal Fault Rupture and Rapid Postseismic Deformation Following 2019 Ridgecrest; California; Earthquake Sequence Revealed From Geodetic Observations.Geophysical Research Letters,47(5).
MLA	Feng W.,et al."Orthogonal Fault Rupture and Rapid Postseismic Deformation Following 2019 Ridgecrest; California; Earthquake Sequence Revealed From Geodetic Observations".Geophysical Research Letters 47.5(2020).