The researchers examined the group of
more than 50 earthquakes that hit the area of Cleburne, Texas in 2009 and 2010, and found that they could have happened because of wastewater injection wells associated with fracking operations. Before 2008, the Fort Worth Basin of Texas had
never experienced an earthquake.
http://thinkprogress.org/climate/2013/12/06/3029951/texas-fracking-earthquakes/
“Because there were no known previous earthquakes, and the located events were close to the two injection wells and near the injection depth, the possibility exists that earthquakes may be related to fluid injection,” the
authors write in their report..........
....…. Earlier this year in Ohio, fracking wastewater disposal was
also linked to the 109 earthquakes that shook Youngstown in 2011 — an area that hadn’t ever experienced an earthquake before an injection well came online in December .......
.......Last month, North Texas was hit by
more than 20 earthquakes, prompting calls for an investigation into a wastewater disposal link.