Weekly Roundup15 earthquakes
Bay Area Earthquake Roundup: Dec 28 - Jan 3, 2026 (15 Earthquakes, Max M3.0)
15 earthquakes recorded in the Bay Area during the week of Dec 28 - Jan 3, 2026. Largest was M3.0. Complete summary and analysis.
Updated Jan 3, 2026, 11:59 PM PTSaratoga, Pacifica, San Ramon +4 more
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Saratoga
M3.0
15
Total Earthquakes
M3.0
Largest Magnitude
7
Cities Affected
Jan 3, 2026
Updated
Weekly Summary
The San Francisco Bay Area recorded 15 earthquakes during the week of Dec 28 - Jan 3, 2026.
Key Statistics
| Metric | Value |
|---|---|
| Total Earthquakes | 15 |
| Largest Magnitude | M3.0 |
| Average Magnitude | M1.30 |
| Most Active Region | San Ramon (8 earthquakes) |
Notable Earthquakes
- M3.0 - 2 km SE of San Ramon, CA
Friday, January 2, 2026 at 12:58 AM
View DetailsActivity by Region
- San Ramon: 8 earthquakes
- Santa Clara: 3 earthquakes
- Gilroy: 2 earthquakes
Swarm Activity
1 earthquake swarm was detected this week:
- San Ramon: 8 earthquakes (Peak: M3.0)
What This Means
This was a relatively quiet week for the Bay Area. However, seismic activity can change quickly, and residents should always maintain earthquake preparedness.
Stay Prepared
- Keep your earthquake emergency kit stocked and accessible
- Know what to do: Drop, Cover, and Hold On
- Report earthquakes you feel: Did You Feel It?
Topics covered
#weeklyroundup#bayarea#seismicactivity#saratoga#pacifica#sanramon#berkeley#dublin
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- February 2026 Seismic Activity Report: 121 Earthquakes (Max M4.2)
- Bay Area Earthquake Roundup: Feb 1 - Feb 7, 2026 (121 Earthquakes, Max M4.2)
- ⚡ Earthquake Swarm Alert: 13 Earthquakes in San Ramon
- 📢 M3.8 Earthquake Near Dublin - Did You Feel It?
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Data source:USGS Earthquake Hazards Program