气候变化领域集成服务门户(CCPortal): The 2019 Mw 5.8 Changning, China earthquake: A cascade rupture of fold-accommodation faults induced by fluid injection

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DOI	10.1016/j.tecto.2021.228721
	The 2019 Mw 5.8 Changning, China earthquake: A cascade rupture of fold-accommodation faults induced by fluid injection
	Li T.; Sun J.; Bao Y.; Zhan Y.; Shen Z.-K.; Xu X.; Lasserre C.
发表日期	2021
ISSN	00401951
卷号	801
英文摘要	Industrial production activities associated with salt mining, hydraulic fracturing, or geothermal exploitation can induce pore pressure and stress field changes, thus inducing seismic activity. Most of the events are not disastrous due to limited energy radiated. Here we report a Mw 5.8 damaging event that occurred in Changning, China on June 17, 2019, probably the largest induced event by industrial exploitation ever recorded. The earthquake is located within the Changning anticline, and it raises great concerns on why and how the event occurred in a relatively quiescent area in terms of tectonic activity. Moreover, it has been debated whether this earthquake ruptured solely on the fold-accommodation faults or also involved a deep-rooted fault under the anticline. By using InSAR data from two satellites, we investigate the detailed rupture and slip pattern of this earthquake. We propose a cascade rupture mode of the fold-accommodation faults, through poroelastic modeling of excess pore pressure by fluid injection and pumping operations and static Coulomb stress calculation on the pre-stressed faults. We argue that water injections may have triggered this event. The result highlights the importance of reassessing seismic hazard over similar tectonic environments with intensive industrial exploitation. © 2021 Elsevier B.V.
关键词	Changning Earthquake Folding deformation Induced seismicity InSAR deformation Poroelastic model Sichuan Basin
英文关键词	Earthquakes; Pore pressure; Excess pore pressure; Fold accommodation faults; Geothermal exploitation; Industrial production; Poroelastic model; Pumping operations; Seismic activity; Tectonic activity; Faulting; deformation; earthquake event; earthquake rupture; fault; fluid injection; folding; induced seismicity; poroelasticity; synthetic aperture radar; Changning [Sichuan]; China; Sichuan; Sichuan Basin; Satellites
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208008
作者单位	State Key Lab. of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, 100029, China; Shanxi Taiyuan Continetal Rift Dynamics National Observation and Research Station, Beijing, 100029, China; Earth, Planetary, and Space Sciences, University of California, California, Los Angeles 90095, United States; National Institute of Natural Hazards, Ministry of Emergency Management of China, Beijing, 100085, China; Univ Lyon, Univ Lyon 1, ENSL, CNRS, LGL-TPE, Villeurbanne, F-69622, France
推荐引用方式 GB/T 7714	Li T.,Sun J.,Bao Y.,et al. The 2019 Mw 5.8 Changning, China earthquake: A cascade rupture of fold-accommodation faults induced by fluid injection[J],2021,801.
APA	Li T..,Sun J..,Bao Y..,Zhan Y..,Shen Z.-K..,...&Lasserre C..(2021).The 2019 Mw 5.8 Changning, China earthquake: A cascade rupture of fold-accommodation faults induced by fluid injection.Tectonophysics,801.
MLA	Li T.,et al."The 2019 Mw 5.8 Changning, China earthquake: A cascade rupture of fold-accommodation faults induced by fluid injection".Tectonophysics 801(2021).