NEW YORK (Bloomberg) -- Four wastewater wells used in oil and natural gas drilling may be responsible for triggering 20% of all earthquakes in the central and eastern U.S. from 2008 to 2013, according to a study published in the journal Science. The wells are used to dispose of high volumes of wastewater released from underground rocks when they are fractured using modern oil-drilling techniques. The four wells are likely responsible for a dramatic rise in earthquakes near Oklahoma City since 2009, according to the research.
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