Blog Post Image: Gas Injection Probably Triggered Small Earthquakes Near Snyder, Texas

Map showing 2009–2011 earthquakes located in this study (red circles), gas injection wells active since 2004 (yellow squares), and focal mechanisms for regional events (beach balls). A series of small quakes occurred in the same region in 1979 and 1980 (green circles) and may have been related to injection of water for enhanced oil recovery. Sources: EarthScope, Texas Railroad Commission, S.T. Harding, and St. Louis University. Illustration by: Cliff Frohlich/University of Texas at Austin.