Oklahoma had a shaky weekend, with 10 minor earthquakes reported since Friday.
The strongest of the quakes hit central Oklahoma on Sunday night, about 30 miles north of Oklahoma City. It was originally recorded as a 4.2 magnitude before being downgraded to 3.8, NBC News reports. Residents from all over the state reported feeling tremors. All of the quakes were minor, and no injuries have been reported yet.
Friday was an especially busy day for earthquakes, with five small quakes rocking Guthrie, Okla., with magnitudes between 2.7 and 3.1. Geologists say that 2.5 is normally the smallest magnitude detectable by humans.