by Associated Press on Thursday, Jul. 3, 2014 1:48 pm
WASHINGTON — A new study explains how just four wells forcing massive amounts of drilling wastewater into the ground are probably shaking up Oklahoma and surrounding states including Arkansas.Those wells seem to have triggered more than 100 small-to-medium earthquakes in the past five years, according to a study published Thursday by the journal Science. Many of the quakes were much farther away from the wells than expected.Combined, those wells daily pour more than 5 million gallons of water a mile or two underground into rock formations, the study found. That buildup of fluid creates more pressure that “has to go somewhere,” said study lead author Cornell University seismologist Katie Keranen.
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via Study: Wastewater Drilling Likely Earthquake Culprit | Arkansas Business News | ArkansasBusiness.com.