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Updated on: July 31, 2025 / 10:13 AM PDT / KCAL News
Multiple earthquakes rattled parts of San Bernardino and Riverside counties Thursday morning, according to the U.S. Geological Survey.
The initial 3.0-magnitude quake struck near Rialto around 8:34 a.m. and was followed by several aftershocks, which varied in magnitudes, including 2.8, 1.2 and 1.0.
A 4.3-magnitude earthquake struck the area near Muscoy almost an hour later, around 9:32 a.m. According to the USGS Interactive Map, the quake could be felt across Southern California as far north as Bakersfield and as far south as Santa Ysabel.
Another 3.1-magnitude quake struck near Rialto around 9:36 a.m. The USGS reported it could be felt in areas including
Dr. Lucy Jones, a seismologist, said the area tends to have several “magnitude-3s every year, on average.”
It is unclear if any injuries or damages have been reported.
Chelsea HyltonChelsea Hylton is a web producer for CBS Los Angeles. An Inglewood native, Hylton has her master’s degree from USC. She covers local breaking news across the Southern California region. Before joining CBS in 2024, she worked at NBC LA, Telemundo 52, The Los Angeles Times and KOMO 4 News in Seattle.
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