The earthquake had a preliminary magnitude of 5.2 and was near the mountain town of Julian, east of San Diego, according to the U.S. Geological Survey. Multiple aftershocks in the 2 and 3 magnitude range have been reported.

The magnitude-5.25 earthquake occurred at 10:08 a.m. about 2.5 miles south of Julian, with a depth of nearly 8 miles, according to the U.S. Geological Survey. The San Diego County-based quake in Julian was felt from Barstow to Mexico, and Catalina Island into Arizona.