A magnitude-4.1 earthquake has shaken San Bernardino County, but there are no immediate reports of injuries or damage.

The temblor struck at 2:41 a.m. Thursday. It was centered 6 miles northeast of Yucaipa and occurred at a depth of about 6 miles, according to a preliminary report from the U.S. Geological Survey.

A dispatcher with the San Bernardino Sheriff's Department says there have been no word of injuries or damage.

Yucaipa is a city of about 50,000 people about 70 miles east of Los Angeles.

Click here for seismic maps and additional information from the USGS