Largest Oklahoma Earthquake Linked to Oil Extraction Wastewater
The largest-ever recorded quake
in Oklahoma was caused by the injection of wastewater, a byproduct of oil extraction, into the ground, new research confirms.
On Nov. 6, 2011, a series of earthquakes, including a 5.6-magnitude temblor, struck the rural town of Prague, about 37 miles (60 kilometers) east of Oklahoma City, crumbling homes in the area and damaging a federal highway. The quake could be felt as far away as Milwaukee.