A new study published this week in the Proceedings of the National Academy of Sciences correlates 93 small earthquakes near Snyder, Texas between 2009 and 2011 with the underground injection of large volumes of gas, primarily carbon dioxide. This illustration shows how carbon dioxide and water can be used to flush residual oil from a subsurface rock formation between wells. Image credit: U.S. Department of Energy. The study focused on an area of northwest...
