M3.3 earthquake 27 km WSW of Westley, CA
A magnitude 3.3 earthquake struck 27 km WSW of Westley, CA at Sep 27, 10:21 AM ET, 3 km deep, minor – felt by people near the epicenter. 15 people reported feeling it.
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| Magnitude | 3.3 mw |
| Time | 27 Sept 2026, 14:21 UTC |
| Location | 37.416°, -121.453° – 27 km WSW of Westley, CA |
| Depth | 3.4 km |
| Felt reports | 15 |
| Max. estimated intensity (MMI) | 3.5 |
| USGS event | nc75443097 |
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 | 5 km S of San Juan Bautista, CA · tsunami flag · PAGER green | Nov 27, 3:57 PM 323 d ago | 8 km | 417 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 |
| 4.0 | 5 km SSE of San Ramon, CA | Dec 19, 10:56 PM 301 d ago | 10 km | 2,228 reports |
| 3.9 | 6 km NW of Pinnacles, CA | Aug 11, 6:19 AM 66 d ago | 5 km | 34 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 |
About this earthquake
How strong was the 27 km WSW of Westley, CA earthquake?
Magnitude 3.3 (mw), minor – felt by people near the epicenter. Depth 3 km. Strongest estimated shaking: intensity 3.5 on the Modified Mercalli scale.
Was it felt?
15 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 2.0.
Were there aftershocks?
No earthquakes within 100 km have followed so far in our records.
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.