Apparently, we will do literally anything - ANYTHING - and look the other way if oil is involved. This includes causing earthquakes.
Read all about it in this piece from The Atlantic.
For 30 years—from 1978 until 2008—Oklahoma experienced an average of two earthquakes per year that measured 3.0 of bigger. But then something crazy happened. In 2009, the number of earthquakes began to shoot up. And it kept climbing. "People thought oh this might be a swarm of earthquakes, where you get a series of small quakes that build up to a bigger one then dies off," Williams said. "But this has just gone on and on. It's over a much broader area. We're not even calling it a swarm anymore. It's surprising."
Last year there were 109 earthquakes of 3.0 or bigger in Oklahoma—a record high. But by one-third of the way through this year, Oklahoma had already logged 145 earthquakes of that magnitude.