Well Owners Told to Lower Water Injection Levels after Oklahoma Quakes November 9, 2017

After a series of small to moderate earthquakes in central Oklahoma, two companies are being told to reduce the amount of wastewater they inject into the ground. About a dozen quakes have struck just south of Hennessey, about 45 miles (72 kilometers) northwest of Oklahoma City since Oct. 31, the largest being a magnitude 4.1. There are no reports of injury or severe damage. Oklahoma Corporation Commission spokesman Matt Skinner says Choate Disposal Service and Chaparral Energy were told to reduce their injection of wastewater in the area. Thousands of quakes have struck Oklahoma in recent years, many linked to the underground injection of wastewater from oil and natural gas production. Several oil and gas producers have been directed to close some wells and reduce injection volumes in others. The U.S. Geological Survey reported an another earthquake, one with a preliminary magnitude of 3.7, was recorded in central Oklahoma on Nov. 8. The quake struck at 5:47 a.m. near Covington, about 55 miles (89 kilometers) north of Oklahoma City. There are no reports of injury or severe damage. The temblor struck about 30 miles (48 kilometers) northeast of where a series of about a dozen earthquakes, including one of magnitude 4.1, have occurred since Oct. 31. Source: https://www.insurancejournal.com/news/southcentral/2017/11/09/470856.htm