Oklahoma oil and gas officials have put more than 200 new disposal wells under scrutiny for the possibility they might be contributing to the state's earthquake swarms.
OKLAHOMA CITY -- As she knocked on the federal government's door for aid in the wake of a damaging earthquake in 2011, Oklahoma Gov. Mary Fallin (R) avoided talking about one aspect of the earthquake -- its cause.
The earthquakes displayed were located in Oklahoma and occurred from Jan. 2, 2008, until Jan. 15, 2015, based on Oklahoma Geological Survey information. The earthquakes are a minimum 2.0 magnitude. Click map to link to animation. Map courtesy of USGS.
A surge in seismic activity is occurring around the U.S., and many top scientists are pointing at injection of waste from drilling and hydraulic fracturing as a possible culprit.