CONTRA COSTA COUNTY, CA - According to the U.S. Geological Survey, a 4.0 magnitude quake occurred near San Ramon Friday ...
CONTRA COSTA COUNTY, CA - the U.S. Geological Survey reported that a preliminary 2.1 magnitude quake struck close to San Ramon Monday morning.
The San Jacinto Fault, considered part of the San Andreas Fault system, has a 5% chance of magnitude 6.7 or larger earthquakes. The line begins at Cajun Pass and runs southeast through San Bernardino, ...
In California's East Bay, a recent swarm of small earthquakes has pushed long-standing seismic risks back into public view. Since early November 2025, at least 90 minor quakes have been recorded ...
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Rapid-fire quakes hit California, thousands in just 8 hours

Thousands of people across the California Bay Area were rattled as a burst of minor earthquakes arrived in rapid succession, turning an ordinary stretch of hours into a rolling reminder of the ...
VENTURA COUNTY, CA - According to the U.S. Geological Survey, a preliminary 2.5 magnitude quake rattled close to Fillmore Thursday morning. At 10:28 a.m., the region was struck by a tremor. The ...