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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.
on May 16 2016 said: Fracking does not cause the earthquake increase in Oklahoma and everyone involved, whether it be scientists, government, oil companies or insurance companies knows it. The rock formations being targeted for drilling today, and fracking is drilling, are more than a mile below the surface typically. There have been more than 1 million oil and gas wells drilled in North America since the late 1800s and the drilling techniques haven't changed too much in the past 40 years.