More than a dozen earthquakes rocked residents awake near San Ramon Monday morning, according to the United States Geological Survey.
The biggest quake was a notable 4.2-magnitude shaker just after 7 a.m. amid an hour-long swarm that began with a 3.9-magnitude earthquake at 6:30 a.m., according to USGS data.
Thousands of people felt the moderate shaking across the Bay Area, according to USGS’s “Did You It Feel It?” survey.
No injuries or property damage have been reported, according to KTVU..
San Ramon, located along the Calaveras Fault, has been a recent hotbed of geological activity, with more than 300 earthquakes reported there since Dec. 1, 2025, KTVU reported.
Two earthquakes were recorded on Friday and another in nearby Dublin, according to the USGS.
At least 19 earthquakes have been confirmed Monday as well as other smaller aftershocks.
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