Geophysical Research Letters · 2015 · 76 citations · 62 references
Natural SciencesEarth SciencesGeophysicsHydraulic FracturingSeismologyTectonicsEarthquake Source PhysicsEarthquake Source ProcessesEngineering SeismologyPetroleum Exploration GeophysicsSeismic InterpretationSeismic MomentFault-plane SolutionsMoment MagnitudeMoment Tensor InversionSeismic Moment Tensor AnalysisSeismic Moment Tensor DecompositionSeismic Source InversionSeismic Source MechanismsSeismic Source Processes
Abstract 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 (∼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 M L 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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Gridding with continuous curvature splines in tension
Walter H. F. Smith, Paul Wessel · Geophysics · 1990 · 1.5K citations