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Recent earthquakes in central Oklahoma under investigation

EDMOND, Okla. –  The Oklahoma Corporation Commission says its Induced Seismicity Department and the Oklahoma Geological Survey are investigating several earthquakes in the central part of the state.

At least six quakes of magnitude 3.0 or stronger have struck since Tuesday in an area about 4 miles northeast of Edmond.

The strongest was a magnitude 4.2 quake Wednesday night. It knocked out two electric substations, leaving about 1,900 customers without power for about an hour.

The quake was originally recorded as a 4.4; however, officials later downgraded it to a 4.2.

No injuries or significant damage are reported.

The injection of wastewater from oil and gas production into disposal wells has been linked to an uptick in earthquakes, but the commission said Thursday no disposal wells are in the area.

A known fault is in the vicinity.