Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 43, Issue 2, Pages 564-573Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL066917
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Funding
- Natural Sciences and Engineering Research Council of Canada
- Helmholtz-Alberta Initiative
- Grants-in-Aid for Scientific Research [25870600] Funding Source: KAKEN
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An earthquake with a reported magnitude of 4.4 (M-L) was detected on 13 June 2015 in western central Alberta, Canada. This event was the third felt earthquake this year near Fox Creek, a shale gas exploration region. Our results from full moment tensor inversions of regional broadband data show a strong strike-slip mechanism with near-vertical fault plane solutions. The decomposition of the moment tensor solution is overwhelmingly double couple, while only a modest (similar to 20%) contribution is attributed to compensated-linear-vector-dipole. The depth of this earthquake is 3-4 km, near the base of the sedimentary layer, and the moment magnitude (M = 3.9) of this event is considerably smaller than the initial reported ML value. The hypocenter location, depth, and mechanism are favorable to a possible association between this earthquake and hydraulic fracturing operations within the Duvernay shale.
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