No injuries have been reported after a pre-dawn earthquake Monday shook parts of South Texas, about 45 miles southeast of San Antonio.

The U.S. Geological Survey says the 3.7 magnitude quake happened at 4:51 a.m.

The quake was detected about 6 miles southwest of the Karnes County town of Falls City, in an area near the line with Wilson County.

The U.S. Geological survey reports the epicenter was at a depth of about 3.1 miles.

Law enforcement authorities say some residents of Wilson County reported feeling the quake.

The agency says a magnitude 4.0 earthquake typically can be felt as far as 60 miles from where it happened.

Texas occasionally has earthquakes.

A minor earthquake was felt by some people in Amarillo on March 30, 2002.

The Amarillo area recorded seven minor earthquakes in 2000, records show.