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Small earthquakes continue to rattle northern Oklahoma

February 6, 2021 GMT

ENID, Okla. (AP) — A series of small earthquakes believed by seismologists to be caused by the underground injection of wastewater from oil and gas production continued to rattle northern Oklahoma on Saturday.

Four quakes occurred Saturday morning, the strongest being magnitude 3.3 about 4 a.m., southeast of Enid in an area about 85 miles-100 miles (137-161 kilometers) north of Oklahoma City.

Nearly two dozen quakes have been recorded in the area since Friday by the Oklahoma Geological Survey with the most powerful being magnitude 4.2.

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No injuries or damage have been reported and geologists say damage is not likely in earthquakes below magnitude 4.0.

State seismologist Jake Walter said it is too soon to be certain of the cause, but that it is likely the tremors are connected to wastewater disposal.

In response to the quakes, the Oklahoma Corporation Commission ordered oil and gas operators to stop disposal of wastewater within three miles of the earthquake epicenters and to reduce disposal volumes within three to 10 miles of the epicenters.