We've known for a couple of years that fracking for oil and gas has been linked to some sizable earthquakes. The shaking doesn't actually come from the high-pressure fracking itself, but from the injection of tons of post-frack dirty wastewater into disposal wells. Only Ohio requires a risk assessment for quakes around the state's injection wells.
Mother Jones digs into this story, speaking with numerous scientists who agree: Frack the earth and it will frack you back. "There is no shortage of evidence," writes reporter Michael Behar.
Between 1972 and 2008, the USGS recorded just a few earthquakes a year in Oklahoma. In 2008, there were more than a dozen; nearly 50 occurred in 2009. In 2010, the number exploded to more than 1,000. These so-called "earthquake swarms" are occurring in other places where the ground is not supposed to move. There have been abrupt upticks in both the size and frequency of quakes in Arkansas, Colorado, Ohio, and Texas. Scientists investigating these anomalies are coming to the same conclusion: The quakes are linked to injection wells. Into most of them goes wastewater from hydraulic fracking, while some ... are filled with leftover fluid from dewatering operations.
Flatter states are more susceptible to fracking-related quakes -- as MoJo puts it, "a stone makes a bigger splash when it's hurled into a glassy pond than a river of raging whitewater." (But pretty please don't take that as an invitation to drill California to shaky bits.)
The least surprising part of all this? That the industry is reluctant to accept that it might be responsible for tearing peoples' houses down -- or at least that it doesn't want to talk to lefty magazines about it.
Some scientists are concerned that industry and government officials don't want to work with them on the issue.