Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 19, Pages 10164-10172Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL070042
Keywords
hydraulic fracture-induced seismicity; seismic hazard due to induced earthquake; spatiotemporal correlation of induced seismicity
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Funding
- Natural Sciences and Engineering Research Council of Canada
- TransAlta
- Nanometrics
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We characterize the statistical relationship between hydraulic fracturing and seismicity in western Canada by using the concept of cellular seismicity. We determine the regionally averaged probability that hydraulic fracture operations will be associated with M3 seismicity within a 10km grid cell. This rate is 0.01 to 0.026 at the 95th percentile confidence limit. Monte Carlo simulations confirm that the observed correlations are extremely unlikely (<<1%) to have been obtained by chance. Proximity to a disposal well and proximity to the Swan Hills Formation, which has been suggested as a proxy for basement controlled faults, appear to increase the likelihood that hydraulic fracturing will trigger seismicity.
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