JULIAN, Calif. – A strong earthquake on Monday morning rattled residents across Southern California, and aftershocks continue to be felt near San Diego.The U.S. Geological Survey said the earthquake struck just after 10 a.m. local time, about 2.5 miles south of Julian, northeast of San Diego, at a depth of about 8 miles.HOW TO WATCH FOX WEATHERJohn Carneiro was at work in Julian, California, where the earthquake was recorded. He told FOX Weather the quake “shook everything” for about 10 seconds and sounded like “the biggest rumble you could ever imagine.”So far, the USGS says residents in San Diego, Long Beach and Los Angeles reported feeling the shaking, and half a dozen aftershocks have been recorded across the region.Aftershocks continued into Monday afternoon, with a magnitude of 4.0 in Julian more than an hour after the initial earthquake. WATCH: STRONG EARTHQUAKE SHAKES CAMERAS, SPOOKS PETS ACROSS SOUTHERN CALIFORNIACalifornia Highway Patrol troopers reported the earthquake shook loose boulders onto Highway 76 in Warner Springs, requiring special equipment to move the large rocks. California Department of Transportation crews were assessing potential damage to the highway after the earthquake. The San Diego Sheriff’s Office said it has not received any reports of major damage or injuries caused by the earthquake.According to the U.S. National Tsunami Warning Center, a tsunami is not expected from this earthquake.Refresh this page and download the free FOX weather app for updates to this story.