Joe and Mary Reneau have discovered new cracks in their patio despite rebuilding it after a 2011 earthquake in Prague, Okla. Many researchers believe hydraulic fracturing used to free oil and gas from rock has contributed to an increase in the number of earthquakes in the state.
Joe and Mary Reneau have discovered new cracks in their patio despite rebuilding it after a 2011 earthquake in Prague, Okla. Many researchers believe hydraulic fracturing used to free oil and gas from rock has contributed to an increase in the number of earthquakes in the state. Los Angeles Times/MCT
Joe and Mary Reneau have discovered new cracks in their patio despite rebuilding it after a 2011 earthquake in Prague, Okla. Many researchers believe hydraulic fracturing used to free oil and gas from rock has contributed to an increase in the number of earthquakes in the state. Los Angeles Times/MCT

Economy

July 03, 2014 4:03 PM

Scientists struggle to figure out why ground is shaking in heartland

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