Southern California was hit with multiple earthquakes Thursday morning.

US Geological Survey

An earthquake with a preliminary magnitude of 4.3 hit Thursday morning near a suburb in San Bernardino County, according to the U.S. Geological Survey.

The quake, which struck at 9:32 a.m., had a depth of about 3.3 miles. The epicenter was near Muscoy, about 60 miles east of Los Angeles.

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As of 10:07 a.m., 4,957 people reported feeling the shake using the USGS Did You Feel It? survey, including people as far north as Santa Clarita and as far south as San Diego.

Several other quakes hit northwest of Rialto, also in San Bernardino County. The first happened at 8:34 a.m. and had a preliminary magnitude of 3.0. The next quake hit at 8:42 a.m. with a preliminary magnitude of 2.8, and the latest one hit at 9:36 a.m. with a preliminary magnitude of 3.1 and depth of 3.8 miles.

The quakes come just a day after a massive magnitude 8.8 earthquake struck in Russia, prompting tsunami warnings along the California coast. 

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July 31, 2025