An earthquake of the magnitude of magnitude 5.0 hit the area near Loma Grande, in the state of California.
A magnitude 5-7 earthquake has been recorded, but the cause of the quake has not been determined.
It is the first time that a magnitude 5 earthquake has struck the Pacific coast of the United States.
Some residents reported feeling vibrations in their ears and bodies.
There were no immediate reports of injuries.
The quake has caused damage to homes, cars, power lines and buildings.
Residents of Loma Viejo and San Fernando Valley have been advised to stay away from the area.
The Los Angeles County Fire Department has closed down all roads in the area and the Ventura County Fire District has advised residents to avoid the area for the time being.
People are urged to report any activity that may have been triggered by the earthquake, as well as any reports of earthquakes to the US Geological Survey (USGS).
It is believed that a large number of people are sheltering in their homes, according to the Ventura and San Gabriel Valley Fire Departments.
The USGS reported that the quake was located off the coast of San Diego, California, at a depth of approximately 12km.
There are no reports of damage to the city.
The magnitude 5 quake is the strongest since the Lomas Grande quake on December 26, 2011.
A smaller earthquake was recorded off the west coast of Oregon in November.
The San Diego Earthquake Center recorded the second-strongest earthquake on record, measuring 5.3 on the Richter scale.
The epicenter was in the San Diego area of the San Francisco Bay area.
At 5.7, it was the strongest earthquake ever recorded off California.
More to follow.