An earthquake registering a magnitude of 4.0 struck off the coast of San Diego at 7:34 a.m. PST.
The quake was felt across San Diego County, including Oceanside, Escondido, Vista and Carlsbad, as well as in Temecula, Laguna Niguel and Ladera Ranch.
According to the U.S. Geological Survey, the earthquake originated about 12 miles underground, around 30 miles west of La Jolla and 37 miles west of San Diego.
There have been no immediate reports of damage or injuries.