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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.
Hydraulic fracturing (fracking for short) is the process of extracting natural gas from ancient bedrock. Natural gas is thought to be a âcleanerâ alternative to coal as it emits less greenhouse gases when burned.