AP-12:15 a.m. (California time)

Small communities in the Mojave Desert are reeling from a magnitude 7.1 earthquake - the second major temblor in as many days to rock Southern California.

Authorities say Friday night's shaker was centered near the town of Ridgecrest - the same area where a 6.4-magnitude quake hit on Independence Day.

Mark Ghillarducci, director of the California Office of Emergency Services, says there are "significant reports of structure fires, mostly as a result of gas leaks or gas line breaks throughout the city."

He also says there's a report of a building collapse in tiny Trona. He says there could be even more serious damage to the region that won't be known until first light on Saturday.

The quake at 8:19 p.m. was felt as far north as Sacramento and even in Las Vegas. It's been followed by a series of sizeable aftershocks.
 

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AP- 10:30 p.m. (California time)

Authorities say a magnitude 7.1 earthquake that jolted California has caused injuries, sparked fires, shut roads and shaken ball games and theme parks.

However, authorities say there are no deaths or major building damage reported from the quake, which struck at 8:19 p.m. Friday.

It was centered about 150 miles from Los Angeles in the Mojave Desert near the town of Ridgecrest, which was still recovering from a 6.4-magnitude preshock that hit the region on Thursday.

There were reports of trailers burning at a mobile home, and State Route 178 in Kern County was closed by a rockslide and roadway damage.

But Kern County Fire Chief David Witt says it appears no buildings collapsed. He also says there have been a lot of ambulance calls but no reported fatalities.

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At 8:30 p.m. California time, 5:30 p.m. Hawaii time, an earthquake with a preliminary magnitude of 6.9 hit Southern California.

The U.S. Geological Survey updated their report saying that the earthquake had a magnitude of 7.1. 

At this time there are no immediate reports of damage or injuries.

If the preliminary magnitude is correct, it would be the largest Southern California quake in 20 years.

According to the Associated Press, the quake was felt downtown as a rolling motion that seemed to last at least a half-minute. It was felt as far away as Las Vegas, and the USGS says it also was felt in Mexico.

This story will be updated as details become available.