In the wake of a major, record-tying 5.6 magnitude Oklahoma earthquake that struck last Saturday morning, Governor Mary Fallin did not wait around to hear any more evidence about the link between seismic activity and the practice of disposing oil and gas wastewater into wells. She just went right ahead and ordered all disposal wells to shut down in Pawnee County, within a 725-square mile area in the Arbuckle shale formation.
https://cleantechnica.com/2016/09/05/oklahoma-earthquake-spurs-emergency-action-on-oil-and-gas/