The magnitude 3.5 earthquake was centered about 2.5 miles south-southwest of South Pasadena, in Los Angeles County, just before 10 a.m. PT, according to the U.S. Geological Survey (USGS).
Thousands of people in Southern California reported feeling the shaking to the USGS, including those in Los Angeles, Long Beach, Glendale and the San Bernardino area.
So far, there have been no reports of injuries or damage.