Rare quakes aren't triggered by fracking, researcher says

09/9/2013 | Oklahoman (Oklahoma City), The

The disposal of drilling fluids in well-injection operations and not hydraulic fracturing can cause occasional earthquakes, said Cliff Frohlich, a seismologist from the University of Texas. The majority of injection wells, however, don't trigger such seismic activity, he added.

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Oklahoman (Oklahoma City), The

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