Oil and gas 'fracking' wastewater caused 11 earthquakes in Ohio: seismologist 

Wasstewater wells have also been suspected in quakes in Arkansas, Colorado, and Oklahoma

Read more: http://www.nydailynews.com/news/national/oil-gas-fracking-wastewater-caused-11-earthquakes-ohio-seismologist-article-1.1000228#ixzz1iPvTM1yj