UPDATE:

10:30 p.m.

  

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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9:50 p.m.

  

An earthquake rattled Dodger Stadium in the fourth inning of the team's game against the San Diego Padres.

  

The quake on Friday night happened when Dodgers second baseman Enriquè Hernàndez was batting. It didn't appear to affect him or Padres pitcher Eric Lauer.

  

However, it was obvious to viewers of the SportsNet LA broadcast when the TV picture bounced up and down.

  

The quake registered an initial magnitude of 6.9 to 7.1, according to the U.S. Geological Survey.

  

There was no announcement by the stadium's public address announcer.

  

Some fans in the upper deck appeared to leave their seats and move to a concourse at the top of the stadium.

  

The press box lurched for about 20 seconds.

  

The quake occurred a day after a magnitude 6.4 quake hit in the Mojave Desert about 150 miles from Los Angeles.

  

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9:40 p.m.

  

Authorities are now reporting injuries and damage from a big earthquake that was felt throughout Southern California and into Las Vegas and even Mexico.

  

The quake that hit at 8:19 p.m. was given a preliminary magnitude of 6.9 to 7.1, but the measurements were being calculated.

  

It followed Thursday's 6.4-mangitude quake that at the time was the largest Southern California quake in 20 years. Both were centered near Ridgecrest in the Mojave Desert.

  

Kern County fire officials reported "multiple injuries and multiple fires" without providing details. San Bernardino County firefighters reported cracked buildings and a minor injury.

  

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8:30 p.m.

An earthquake with a preliminary magnitude of 6.9 has jolted Southern California, but there are no immediate reports of damage or injuries.

  

The U.S. Geological Survey says the quake hit at 8:19 p.m. Friday and was centered 11 miles from Ridgecrest, where a magnitude 6.4 quake struck on Thursday. The agency initially said the earthquake had a magnitude of 7.1.

  

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.

  

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

  

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Original Story: Gov. Gavin Newsom has declared a state of emergency for Kern County, which was at the epicenter of a magnitude 6.4 earthquake Thursday.

The declaration means that the state will help the county and municipalities in it with emergency aid and recovery efforts.

Ridgecrest Mayor Peggy Breeden praised Newsom for declaring the emergency. She also noted at a news conference that other nearby governments have offered to help the recovery effort.

A magnitude 5.4 quake at 4:07 a.m. Friday is so far the strongest aftershock of Thursday's magnitude 6.4 jolt, and was felt widely.

Seismologists had said there was an 80% probability of an aftershock of that strength.

Kern County Fire Chief David Witt says emergency crews are dealing with small vegetation fires, cracks on some roads and gas leaks that were reported after the quake Thursday. It struck in the Mojave Desert, about 150 miles (240 kilometers) northeast of Los Angeles, near Ridgecrest. It is the strongest quake to hit the region in 20 years.

Witt says 15 patients were being evacuated from the Ridgecrest Regional Hospital as a precaution and out of concern for aftershocks.

Kern County District Supervisor Mick Gleason told CNN there are some structural issues with the hospital and some patients had to be moved from one ward to another and that others were taken to a neighboring building.

The magnitude 6.4 quake struck at 10:33 a.m. Thursday in the Mojave Desert, about 150 miles (240 kilometers) northeast of Los Angeles.

Seismologist Lucy Jones says a series of aftershocks were occurring and that at least one of them was a 4.3 magnitude temblor. She expects more to come.

She says she wouldn't be surprised if a magnitude 5 quake occurred during the aftershocks. At least 100 aftershocks have been recorded. 

Dr. Jones also said that she felt a long rolling motion that lasted about 10 seconds. 

People as far as Las Vegas reported feeling the quake. 

Dr. Jones says the previous large quake was a 7.1 on that struck in the area on October 16, 1999.

The National Weather Service says no tsunami is expected.