A magnitude-3.9 earthquake centered about a mile west of San Juan Capistrano rattled homes and offices across much of the county today.
According to the U.S. Geological Survey, the quake struck at 10:37 a.m. about two miles north-northeast of Dana Point and three miles south-southeast of Laguna Niguel.
There were no immediate reports of damage or injuries.
"We did feel it here at City Hall, but it was pretty mild and we don't have any damage," said Lori Doll, an administrative coordinator in the San Juan Capistrano City Manager's Office.
"Nothing came off the walls, no damage, it's kind of a rolling one," Doll said.
Orange County Fire Authority Capt. Marc Stone said there were no reports of damage, but firefighters were going through their usual protocol following an earthquake to ensure the temblor caused no other problems.
Orange County sheriff's officials also said there were no immediate calls for service related to the earthquake.
The quake was reportedly felt as far away as Glendale, Riverside and Temecula.
Officials at Southern California Edison said the quake Orange County had no impact on the San Onofre Nuclear Generation Station, which has been shut down since January for repair work.