To extract oil and gas in tight shale formations, hydraulic fracturing is used to stimulate fracture growth and increase permeability. Typically, low (−3.0 to 0.0 Mw) magnitude earthquakes are produced during hydraulic fracturing (Maxwell et al., 2002, 2009). In a few cases, however, hydraulic fracturing has been linked to widely observed larger, so‐called positive magnitude, earthquakes. Examples include earthquakes felt by the general population in such areas as Blackpool, England, ML 2.3 (de Pater and Baisch, 2011), Horn River Basin, Canada, ML 3.8 (British Colombia Oil and Gas Commission...

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