A strong earthquake shook Southern California tonight, causing buildings to sway and triggering some precautionary evacuations.
There were no reports of damage or injuries.
The jolt was felt from Los Angeles to San Diego, and slightly in Las Vegas.
The 11.42am (1942 BST) quake was initially estimated at 5.8 but was revised downward to magnitude 5.4, said seismologist Kate Hutton of the US Geological Survey office in Pasadena. More than a dozen aftershocks quickly followed, the largest estimated at magnitude 3.8.
The quake was centred 29 miles south-east of Los Angeles near the San Bernardino County city of Chino Hills, and the US Geological Survey estimated the quake was about 8 miles below the earth’s surface.
“It will certainly cause cracked plaster and broken windows, but probably not structural damage,” Hutton said.
The magnitude 5.9 Whittier Narrows quake in 1987 was the last big quake in that area. It severely damaged older buildings and houses in communities east of Los Angeles.
The Governor’s Office of Emergency Services received no damage or injury reports.
Los Angeles Fire Department said there were no reports of damage or injury in Los Angeles. San Bernardino and San Diego counties also had no reports of damage.
Buildings swayed in central Los Angeles for several seconds.
Workers evacuated some office buildings.
“It was dramatic. The whole building moved and it lasted for a while,” said Los Angeles County sheriff’s spokesman Steve Whitmore, who was in the sheriff’s Monterey Park headquarters east of Los Angeles.