CMA Foundation is a 501(C)3 organization and a subsidiary of the California Medical Association. Â©
The study, published Tuesday in Seismological Research Letters, reports that fracking waste injection wells are now the leading cause of earthquakes in Texas. Hydraulic fracturing, or fracking, involves thrusting chemicals and water against shale rock to break it up and release oil or gas. The process produces large amounts of waste fluid, or brine, that is either recycled or disposed of in injection wells.
Read More Fracking caused 2014 Ohio earthquake: Study. The Environmental Protection Agency said there no plans for new regulations as a result of the USGS study. We knew there would be challenges there, but they can be overcome, EPA Administrator Gina McCarthy said Thursday at an energy conference in Houston.