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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.
Hidden Faults Explain Earthquakes in Fracking Zones February 12th, 2015 Two new studies explain why some regions of the country are rattling more than others as oil and gas production rises. Read More Â».