A 4.8 magnitude earthquake shakes Oklahoma early Saturday morning, according to the Oklahoma Geological Survey. The earthquake was initially reported as a 4.7 magnitude quake by the United States Geological Society.

The earthquake struck about 20 miles northeast of Shawnee at 2:12 a.m. Saturday morning. The epicenter was located 6 miles north of Prague, 7 miles east-southeast of Sparks, and 47 miles east of Oklahoma City. The earthquake was only 3 miles deep.

Austin Holland, a researcher with the Oklahoma Geological Survey, said the earthquakes occurred on a known fault line. Roughly 40 aftershocks have taken place after the initial 4.8 magnitude earthquake.