Chris Woodyard

USA TODAY

LOS ANGELES — A magnitude-5.2 earthquake rocked Southern California early Friday, rousing residents out of bed around 1:05 a.m. local time.

The quake's center was located about 13 miles north-northwest near Borrego Springs in the desert east of Los Angeles, the U.S. Geological Service reported.

On the west side of Los Angeles, about 100 miles from the epicenter, the quake produced a long shaking motion lasting about 30 seconds. There were no immediate reports of damage or injuries.

In USA TODAY's news bureau on the ninth floor of an office tower near Los Angeles International Airport, window blinds shook, and the building rolled in steady waves.

The quake was also felt in San Diego.

Seismologist Lucy Jones tweeted that quake struck on the San Jacinto fault, one of the most active in the region. She says the same fault produced a magnitude-6 earthquake in 1937 and a 5.3 quake in 1980.