Oklahoma earthquakes under investigation after power is knocked out

EDMOND, Okla. (AP) — 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 — about 15 miles northeast of Oklahoma City.
The strongest was a magnitude 4.2 quake Wednesday night. It knocked out two electric substations, leaving about 1,900 cu