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FIGURE I.3 Map view of hydraulic fracture microseismic events during a four-well stimulation (dark blue lines on the map) in the Barnett Shale. Red events are interpreted to be associated with hydraulic fracturing; blue dots indicate microseismicity associated with the reactivation of a strike-slip fault. See Wessels et al. (2011) for details. Some hydraulic fracture stages were not mapped. SOURCE: Wessels et al. (2011).

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