气候变化领域集成服务门户(CCPortal): Stress Chatter via Fluid Flow and Fault Slip in a Hydraulic Fracturing-Induced Earthquake Sequence in the Montney Formation; British Columbia

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DOI	10.1029/2020GL087254
	Stress Chatter via Fluid Flow and Fault Slip in a Hydraulic Fracturing-Induced Earthquake Sequence in the Montney Formation; British Columbia
	Peña Castro A.F.; Roth M.P.; Verdecchia A.; Onwuemeka J.; Liu Y.; Harrington R.M.; Zhang Y.; Kao H.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Source processes of injection-induced earthquakes involve complex fluid-rock interaction often elusive to regional seismic monitoring. Here we combine observations from a local seismograph array in the Montney Formation, northeast British Columbia, and stress modeling to examine the spatiotemporal evolution of the 30 November 2018 Mw 4.2 (ML 4.5) hydraulic fracturing-induced earthquake sequence. The isolated occurrence of the mainshock at a depth of ∼4.5 km in the crystalline basement 2 days following injection onset at ∼2.5 km depth suggests direct triggering by rapid fluid pressure increase via a high-permeability conduit. Most aftershocks are in the top 2 km sedimentary layers, with focal mechanisms indicating discrete slip along subvertical surfaces in an ∼1 km wide deformation zone. Aftershock distribution is consistent with static stress triggering from the Mw 4.2 coseismic slip. Our analysis suggests that complex hydraulic and stress transfer between fracture networks needs to be considered in induced seismic hazard assessment. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Complex networks; Earthquake effects; Flow of fluids; Fracture; Hydraulic fracturing; Aftershock distributions; Crystalline basement; Earthquake sequences; High permeability; Sedimentary layers; Seismic hazard assessment; Seismic monitoring; Spatiotemporal evolution; Fault slips; aftershock; coseismic process; earthquake event; earthquake trigger; fault slip; fluid flow; fluid pressure; focal mechanism; hazard assessment; hydraulic fracturing; induced seismicity; seismic hazard; British Columbia; Canada
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/170130
作者单位	Department of Earth and Planetary Sciences, McGill University, Montréal, QC, Canada; Institute of Geology, Mineralogy and Geophysics, Ruhr University Bochum, Bochum, Germany; School of Earth and Space Sciences, Peking University, Beijing, China; Pacific Geoscience Centre, Geological Survey of Canada, Sidney, BC, Canada
推荐引用方式 GB/T 7714	Peña Castro A.F.,Roth M.P.,Verdecchia A.,et al. Stress Chatter via Fluid Flow and Fault Slip in a Hydraulic Fracturing-Induced Earthquake Sequence in the Montney Formation; British Columbia[J],2020,47(14).
APA	Peña Castro A.F..,Roth M.P..,Verdecchia A..,Onwuemeka J..,Liu Y..,...&Kao H..(2020).Stress Chatter via Fluid Flow and Fault Slip in a Hydraulic Fracturing-Induced Earthquake Sequence in the Montney Formation; British Columbia.Geophysical Research Letters,47(14).
MLA	Peña Castro A.F.,et al."Stress Chatter via Fluid Flow and Fault Slip in a Hydraulic Fracturing-Induced Earthquake Sequence in the Montney Formation; British Columbia".Geophysical Research Letters 47.14(2020).