Event Brief
Jan 30, 2026 at 2:00 PM ET
3.4M quake rattles East Bay, felt across the region
By The BriefBrief
A 3.4-magnitude earthquake struck San Ramon, felt from Martinez to Fremont.
WHO: U.S. Geological Survey
WHAT: Preliminary 3.4-magnitude earthquake
WHEN: Jan 30, 2026 at 1:43 PM ET
WHERE: San Francisco, CA
WHY: Occurred along the Calaveras Fault
How this brief is built: The BriefBrief correlates multiple sources into one evolving event brief, updated as new facts emerge.
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