Wednesday, October 3, 2012

Fracking and Earthquakes - Update

A state geologist reportedly has concluded that the earthquake in Williams County on the morning of September 28 was characteristic of past seismic activity in the area and was not related to hydraulic fracturing. The earthquake had a magnitude of 3.3 and occurred at a depth of approximately 2,000 feet, much shallower than the depths at which most fracking in the Williston Basin is done, according to the geologist, who stated that it is generally believed that fracking does not contribute to earthquakes. Read more

Meanwhile, however, a Texas scientist reportedly has concluded that three weekend quakes in the Dallas area may be connected to past disposal of wastewater from local hydraulic fracturing operations in the region. Two of the quakes, with magnitudes of 3.4 and 3.1, occurred on Saturday, with the third magnitude 2.1 quake occurring on Sunday. The scientist has studied 67 earthquakes that occurred in the Barnett shale of northern Texas between 2009 and 2011 and determined that approximately two-thirds of them occurred within two miles of one or more injection wells for wastewater disposal. Read more

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