YUCAIPA, Calif.—A small-to-moderate earthquake has shaken San Bernardino County, east of Los Angeles, but there are no immediate reports of injuries or damage.

The magnitude-4.1 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.

San Bernardino County sheriff’s spokeswoman Jodi Miller says there has been no word of injuries or damage.

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

There have been at least eight quakes of magnitude-4.0 or bigger in California this year. Quakes of this size can sometimes produce local damage like broken windows near the epicenter.