SAN DIEGO >> A 5.2-magnitude earthquake shook Southern California on Monday morning, sending boulders tumbling onto rural roadways outside San Diego and rattling items off shelves and walls, but officials reported no injuries or major damage.

The quake, according to the U.S. Geological Survey, struck at 10:08 a.m. and was centered in San Diego County only a couple miles from Julian, a mountain town of about 1,500 people known for its apple pie shops. It was felt as far north as Los Angeles County, about 120 miles away. The quake was followed by several aftershocks.

“I thought the single-pane windows were going to crack because they were shaking pretty good, but they didn’t,” said Paul Nelson, owner of a former gold mine that operated in the 1870s in Julian.

He said some picture frames on the counter at the gift shop fell over at the Eagle Mining Co., but the tunnels that tourists can explore suffered no damage. On Sunday, Nelson said a smaller quake hit when about two dozen visitors were touring the defunct mine but everyone stayed calm. No one was inside the old mine when Monday’s temblor rocked the ground for a longer time.

Transportation officials warned motorists to watch out for rocks that tumbled down hillsides and onto roads and highways, including State Route 76 northwest of Julian. Crews were assessing roadways for potential damage, the California Department of Transportation in San Diego County said.

North County Transit District trains were also delayed so crews could inspect the tracks for any potential damage, spokesperson Mary Dover said in an email to The Associated Press.

Schoolchildren were escorted outside of buildings as a precaution when the ground started moving, said Capt. Thomas Shoots of the California Department of Forestry and Fire Protection for San Diego County. He got a shake alert and then started feeling things rolling and banging.

“There was a lot of shaking and rattling around,” he said. “But thankfully everything seems to be back to normal.”

The San Diego County Sheriff’s Department said it had received no reports of damage or injuries.

Riley Ozuna, owner of the Julian Cafe & Bakery, said some cups fell onto the ground at her business. “But everything is OK,” she said.