M4.0 earthquake 5 km SSE of San Ramon, CA
A magnitude 4.0 earthquake struck 5 km SSE of San Ramon, CA at Dec 19, 10:56 PM ET, 10 km deep, minor – felt by people near the epicenter. 2,228 people reported feeling it.
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| Magnitude | 4.0 mw |
| Time | 20 Dec 2025, 03:56 UTC |
| Location | 37.744°, -121.953° – 5 km SSE of San Ramon, CA |
| Depth | 9.6 km |
| Felt reports | 2228 |
| Max. estimated intensity (MMI) | 4.1 |
| USGS event | nc75283031 |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 4.6 | 1 km SE of Boulder Creek, CA · PAGER green | Apr 2, 4:41 AM 197 d ago | 10 km | 33,078 reports |
| 4.3 | 2 km ESE of Berkeley, CA · tsunami flag · PAGER green | Sep 22, 5:56 AM 389 d ago | 8 km | 31,810 reports |
| 4.2 | 4 km SE of San Ramon, CA · tsunami flag · PAGER green | Feb 2, 10:01 AM 256 d ago | 10 km | 5,032 reports |
| 4.0 | 6 km W of Glen Ellen, CA · tsunami flag · PAGER green | Dec 14, 6:30 PM 306 d ago | 3 km | 1,174 reports |
| 4.0 | 8 km E of Gilroy, CA · tsunami flag · PAGER green | Nov 26, 9:16 AM 324 d ago | 3 km | 920 reports |
| 3.9 | 5 km SE of San Ramon, CA · PAGER green | Dec 20, 9:31 PM 300 d ago | 10 km | 2,028 reports |
| 3.8 | 3 km N of San Leandro, CA · PAGER green | Aug 13, 11:30 AM 64 d ago | 6 km | 7,876 reports |
| 3.8 | 3 km SE of San Ramon, CA | Nov 9, 12:38 PM 341 d ago | 9 km | 596 reports |
| 3.8 | 4 km SSE of San Ramon, CA | Feb 2, 9:27 AM 256 d ago | 9 km | 1,501 reports |
| 3.8 | 5 km SSE of San Ramon, CA | Feb 2, 10:27 AM 256 d ago | 8 km | 650 reports |
| 3.8 | 5 km SSE of San Ramon, CA | Dec 19, 10:49 PM 301 d ago | 10 km | 1,040 reports |
| 3.6 | 9 km E of Gilroy, CA | Nov 26, 9:20 AM 324 d ago | 4 km | 174 reports |
About this earthquake
How strong was the 5 km SSE of San Ramon, CA earthquake?
Magnitude 4.0 (mw), minor – felt by people near the epicenter. Depth 10 km. Strongest estimated shaking: intensity 4.1 on the Modified Mercalli scale.
Was it felt?
2,228 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 3.7.
Were there aftershocks?
1 earthquakes within 100 km in the following two weeks are in our records, the strongest M3.9.
More
Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.