Gas injection probably triggered small earthquakes near Snyder, Texas

A series of small earthquakes near Snyder, Texas between 2006 and 2011 were probably triggered by the underground injection of large volumes of gas, primarily carbon dioxide — a finding that has implications for the process of carbon capture and storage. Experts also note that similar rates of injections have not triggered comparable quakes in other fields, bolstering the idea that gas injection does not cause significant seismic events in many geologic settings.
Source: http://www.sciencedaily.com/releases/2013/11/131104152726.htm