DOI: 10.1016/j.tecto.2021.228721
论文题名: The 2019 Mw 5.8 Changning, China earthquake: A cascade rupture of fold-accommodation faults induced by fluid injection
作者: Li T. ; Sun J. ; Bao Y. ; Zhan Y. ; Shen Z.-K. ; Xu X. ; Lasserre C.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 801 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170841
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Tectonophysics,2021-01-01,801