The quake, reported shortly after 3 p.m., was centered 4.4 miles west of Palos Verdes Estates, 5.3 miles west-southwest of Redondo Beach and 5.3 miles southwest of Hermosa Beach.
The floor shook at various levels from Oxnard to Riverside, in accordance with a USGS map. The quake occurred at a depth of eight miles.
No accidents or harm have been instantly reported.