STILLWATER, Oklahoma - An earthquake rattled Saturday night in northern Oklahoma, the U.S. Geological Survey reported.

The 3.9-magnitude earthquake was reported about 8:45 p.m. Saturday. Its epicenter was about six miles north, northeast of Stillwater, 7 miles south of Morrison and 57 miles north, northeast of Oklahoma City.

The earthquake was more than three miles deep.

No immediate reports of damage or injuries were reported.