More Evidence Shows Drilling Causes Earthquakes

A Chesapeake natural gas rig is worked on in the North Texas Barnett Shale bedrock deposit near Kennedale, Tex., in 2009 Photograph by Matt Nager/Bloomberg

A recent study (abstract here) published in the journal Geology is getting a lot of attention for  conclusions it draws about whether oil and natural gas drilling is causing earthquakes. In particular, the study examines the biggest quake in the history of Oklahoma, a 5.7 shaker that hit the tiny town of Prague on Nov. 6, 2011. Ripples from the earthquake were felt across 17 states.

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