A moderate earthquake has hit Los Angeles, but there are no initial reports of injury or damage.
The US Geological Survey originially measured the quake at 5.6, then upgraded it to 5.8, before dropping it to 5.4. The tremors were felt as far south as San Diego, and as far east as Las Vegas.
The quake hit just before midday, and lasted about five seconds. The epicentre was in the Chino Hills 50 kms east of the city, about 12 kms underground.
People were moved to safety at large sports grounds and tourist attractions, but Los Angeles airport reported no delays to flights.
Los Angeles lies along California’s active San Andreas fault, and seismologists have long warned of the possibility of a major earthquake.