The 5.2-magnitude temblor occurred at 10:08 a.m., centered in the Pine Hills area, about 2.5 miles south of Julian, according to the U.S. Geological Survey. A series of aftershocks promptly hit in the same general area, most with magnitude readings of less than 3.0, though one, near Borrego Springs, registered 3.5, the agency reported.

An earthquake with a preliminary magnitude of 5.2 struck in the Julian area of San Diego County Monday, but there were no immediate reports of damage or injuries.

The 5.2 quake was centered near Julian. There were no immediate reports of major damage or injuries but some residents reported feeling a strong jolt.