An increase in seismic activity in Oklahoma since 2009 may be in part related to activity associated with oil production, the U.S. Geological Survey finds. “In Oklahoma, seismicity rates since 2009 far surpass previously observed rates at any time during the 20th century,” Susan Hough, a USGS seismologist, said in a statement. “Several lines of evidence further suggest that most of the significant earthquakes in Oklahoma during the 20th century may also have been induced by oil production activities.” Energy consultant Wood Mackenzie said Oklahoma shale was on par with the Eagle Ford basin in Texas and the Bakken shale in North Dakota with production expected to pass 1 million barrels of oil equivalent per day by 2020. Oklahoma is the No. […]