Residents reported feeling a shake from the San Fernando Valley all the way to Orange and Riverside Counties.
People said they felt the jolt in Beverly Hills, Glendale, Inglewood, the San Gabriel Valley, parts of the San Fernando Valley, West Covina, Fontana, Ontario, Montclair and Irvine.
Caltech reported that people near the epicenter said the quake felt like a violent shake.
No reports of damage were reported.