The U.S. Geological Survey said nine earthquakes shook central Oklahoma.
The USGS reports the quakes started with a 3.0 magnitude tremor 1:45 a.m. early this morning. The largest were a 4.3 and 4.2 magnitude quakes at 1:56 a.m. and 5:15 a.m.
The most recent was magnitude 3.6 recorded near Luther where seven of the quakes were centered. The quakes include a 3.5 magnitude tremor and others measured at magnitudes 3.3 and 2.8 and two others of magnitude 3.0.
All the quakes were centered in an area 25-50 miles northeast of Oklahoma City.
Authorities said there have been no reports of injury or damage.