气候变化领域集成服务门户(CCPortal): InSAR Evidence Indicates a Link Between Fluid Injection for Salt Mining and the 2019 Changning (China) Earthquake Sequence

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DOI	10.1029/2020GL087603
	InSAR Evidence Indicates a Link Between Fluid Injection for Salt Mining and the 2019 Changning (China) Earthquake Sequence
	Wang S.; Jiang G.; Weingarten M.; Niu Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	In June 2019, an earthquake sequence comprising five M > 5 events occurred in a region of southwest China with fluid injection for both hydraulic fracturing and salt mining, which raised an extensive controversy on the cause. Here we use interferometric synthetic aperture radar (InSAR) observations to determine the source parameters of the sequence and to investigate the relationship with local injection activities. Both Sentinel-1 and Advanced Land Observing Satellite 2 SAR images are collected to measure coseismic and preseismic surface deformation. Geodetic inversions with coseismic observations show that the sequence ruptured a previously unmapped southwest-dipping thrust fault above 3 km depth, which intersects with the open-hole sections of wells for solution mining of salt. In the 4 months before the sequence, cumulative line-of-sight displacements near the wells are around 1–2 cm after correcting seasonal-like deformation. Our results indicate that water injection likely enhanced pore pressure within the fault zone and thus contributed to inducing the sequence. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Deformation; Earthquakes; Faulting; Advanced land observing satellites; Coseismic observations; Earthquake sequences; Fluid injections; Interferometric synthetic aperture radars; Source parameters; Southwest China; Surface deformation; Synthetic aperture radar; deformation mechanism; earthquake event; fluid injection; hydraulic fracturing; pore pressure; satellite imagery; Sentinel; solution mining; spatiotemporal analysis; synthetic aperture radar; Changning [Yunnan]; China
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/169938
作者单位	School of Geomatics Science and Technology, Nanjing Tech University, Nanjing, China; School of Geodesy and Geomatics, Wuhan University, Wuhan, China; Department of Geological Sciences, San Diego State University, San Diego, CA, United States; College of Geology Engineering and Geomatics, Chang'an University, Xi'an, China
推荐引用方式 GB/T 7714	Wang S.,Jiang G.,Weingarten M.,et al. InSAR Evidence Indicates a Link Between Fluid Injection for Salt Mining and the 2019 Changning (China) Earthquake Sequence[J],2020,47(16).
APA	Wang S.,Jiang G.,Weingarten M.,&Niu Y..(2020).InSAR Evidence Indicates a Link Between Fluid Injection for Salt Mining and the 2019 Changning (China) Earthquake Sequence.Geophysical Research Letters,47(16).
MLA	Wang S.,et al."InSAR Evidence Indicates a Link Between Fluid Injection for Salt Mining and the 2019 Changning (China) Earthquake Sequence".Geophysical Research Letters 47.16(2020).