A series of earthquakes centered in northern Oklahoma early Sunday morning were felt across much of Southern and Eastern Kansas.

The United States Geological Survey recorded nine earthquakes of a magnitude 2.5 or greater early Sunday, after four were recorded Saturday. The strongest were two quakes registering 4.3.

Nearly all of the quakes were centered near Crescent, Oklahoma. The strongest was 21 miles north of Crescent, 21 miles northwest of Guthrie and 22 miles southeast of Enid.

The National Weather Service says the strongest earthquakes Sunday were felt across much of southern and eastern Kansas, including the Wichita and Kansas City areas.

There were no immediate reports of damage or injuries.

Small earthquakes in southern Kansas and Northern Oklahoma have become more common, with more than two dozen recorded over the past two years. The area has been the site of increased oil and gas drilling since 2011. Scientists disagree on whether that causes the earthquakes.