Likely cause of 2013-14 earthquakes: Combination of gas field fluid injection and removal

A seismology team finds that high volumes of wastewater injection combined with saltwater (brine) extraction from natural gas wells is the most likely cause of earthquakes near Azle, Texas, from late 2013 through spring 2014. The team identified two intersecting faults and developed a sophisticated 3-D model to assess changing fluid pressure within a rock formation, and the stress changes induced by both wastewater injection and gas production wells. —> Read More