Magnitude 7.1 earthquake strikes Southern California one day after 6.4 quake on July 4

Southern California was jolted by a magnitude 7.1 earthquake at 8:19 p.m. on Friday one day after the region was hit by a 6.4 quake, the USGS reports.

The epicenter was 10.5 miles away from Ridgecrest, Calif., and there were no immediate reports of damage or injuries. According to the USGS, the quake was felt as far north as San Jose and as far south as parts of Mexico.

After Friday night’s quake, the USGS said Thursday’s 6.4 quake was a “foreshock” for the earthquake Friday night, and Southern California residents should expect aftershocks.

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The USGS also did not rule out the possibility that Friday night’s 7.1 quake could be a foreshock to something even bigger. After Thursday’s quake, USGS officials said there was a 5 percent chance a bigger quake could strike the same region.

“With any earthquake, there is a 5 percent chance something even bigger will happen within the next three days,” USGS seismologist Susan Hough told SFGATE on Thursday. “If it did, it would be in the same remote area.”

A 5.4 quake early Friday morning was the largest aftershock of the Fourth of July quake.

The quake was felt in both Los Angeles and Las Vegas. An NBA Summer League game between the New York Knicks and New Orleans Pelicans in Las Vegas was postponed indefinitely.

Thursday’s quake struck at 10:33 a.m., and was the largest temblor to strike the region in 20 years, until Friday night. According to the USGS, a 7.1-magnitude earthquake is 11 times stronger than the 6.4 earthquake.

This story is developing and will be updated as more information is made available.

SFGATE staff writer Amy Graff contributed to this report.