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- W3040748029 abstract "Abstract 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 M w 4.2 (M L 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 M w 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." @default.
- W3040748029 created "2020-07-16" @default.
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- W3040748029 date "2020-07-22" @default.
- W3040748029 modified "2023-10-14" @default.
- W3040748029 title "Stress Chatter via Fluid Flow and Fault Slip in a Hydraulic Fracturing‐Induced Earthquake Sequence in the Montney Formation, British Columbia" @default.
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- W3040748029 doi "https://doi.org/10.1029/2020gl087254" @default.
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