Tuesday, December 25, 2012

Scientists link Colo., Okla. temblors to drilling activities

Scientists are saying with increased certainty that two damaging earthquakes in 2011 -- one in Colorado, the other in Oklahoma -- were triggered by oil and gas production activities.

Studies by seismologists from the U.S. Geological Survey, the University of Oklahoma and Columbia University have found the quakes were caused by the deep underground injection of drilling waste.

The researchers are to present their findings this week at the fall meeting of the American Geophysical Union in San Francisco.