The Fracking Process Is Now The Leading Cause Of Earthquakes In Texas

In the last 40 years, oil and gas activity has caused some 60 percent of Texas earthquakes higher than magnitude 3 in the Richter scale, a new study led by researchers from the University of Texas at Austin found.

“Oil field practices have been causing earthquakes in Texas probably for about 90 years,” Cliff Frohlich, lead author and associate director of the Institute for Geophysics at the University of Texas at Austin, told ThinkProgress. But “it looks like that as oil field practices changed in the last century, the causes of man-made earthquakes changed.”
http://thinkprogress.org/climate/2016/05/19/3779576/texas-human-caused-earthquakes-tied-to-oil-extraction/