Oil, gas wastewater disposal causes cascade of Oklahoma quakes-USGS
March 11, 2014 at 10:31 AM EDT
March 11 (Reuters) - Underground disposal of wastewater from oil and gas drilling likely triggered a series of earthquakes in central Oklahoma in November 2011, according to a study from the U.S. Geological Survey that will add to the controversy surrounding the impact of the U.S. energy boom.