M3.3 earthquake 4 km WSW of Ridgemark, CA
A magnitude 3.3 earthquake struck 4 km WSW of Ridgemark, CA at Dec 21, 3:40 PM ET, 7 km deep, minor – felt by people near the epicenter. 40 people reported feeling it.
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| Magnitude | 3.3 ml |
| Time | 21 Dec 2025, 20:40 UTC |
| Location | 36.790°, -121.408° – 4 km WSW of Ridgemark, CA |
| Depth | 7.0 km |
| Felt reports | 40 |
| Max. estimated intensity (MMI) | 3.2 |
| USGS event | nc75284286 |
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 198 d ago | 10 km | 33,078 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 |
| 3.9 | 6 km NW of Pinnacles, CA | Aug 11, 6:19 AM 66 d ago | 5 km | 34 reports |
| 3.7 | 6 km S of San Juan Bautista, CA · PAGER green | Nov 27, 3:48 PM 323 d ago | 8 km | 53 reports |
| 3.6 | 9 km E of Gilroy, CA | Nov 26, 9:20 AM 324 d ago | 4 km | 174 reports |
| 3.6 | 2 km ENE of Ridgemark, CA | May 17, 2:28 AM 153 d ago | 7 km | 144 reports |
| 3.5 | 16 km NW of Pinnacles, CA | Jul 9, 10:49 AM 99 d ago | 10 km | 194 reports |
| 3.4 | 14 km S of Tres Pinos, CA | Jan 15, 9:24 PM 274 d ago | 6 km | 13 reports |
| 3.4 | 10 km NW of Pinnacles, CA | Mar 2, 10:17 AM 228 d ago | 8 km | 28 reports |
| 3.4 | 5 km SW of Ridgemark, CA | Jun 23, 5:03 AM 115 d ago | 8 km | 43 reports |
| 3.4 | 6 km NNW of Pinnacles, CA | Aug 2, 8:36 AM 75 d ago | 3 km | 19 reports |
About this earthquake
How strong was the 4 km WSW of Ridgemark, CA earthquake?
Magnitude 3.3 (ml), minor – felt by people near the epicenter. Depth 7 km. Strongest estimated shaking: intensity 3.2 on the Modified Mercalli scale.
Was it felt?
40 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 3.6.
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.