M3.9 earthquake 15 km NNE of Alder Springs, CA
A magnitude 3.9 earthquake struck 15 km NNE of Alder Springs, CA at Jul 2, 9:39 PM ET, 14 km deep, minor – felt by people near the epicenter. 5 people reported feeling it.
Share
| Magnitude | 3.9 mw |
| Time | 3 Jul 2026, 01:39 UTC |
| Location | 39.785°, -122.684° – 15 km NNE of Alder Springs, CA |
| Depth | 14.2 km |
| Felt reports | 5 |
| Max. estimated intensity (MMI) | 2.9 |
| USGS event | nc75388321 |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 5.6 | 11 km N of Redwood Valley, CA · PAGER yellow | Jun 24, 11:10 AM 114 d ago | 9 km | 5,311 reports |
| 4.4 | 11 km N of Covelo, CA · PAGER green | Jul 10, 9:14 PM 98 d ago | 10 km | 66 reports |
| 4.4 | 9 km ESE of Willits, CA · tsunami flag · PAGER green | Jan 13, 4:10 PM 276 d ago | 8 km | 414 reports |
| 4.4 | 31 km NNW of Covelo, CA · PAGER green | Aug 5, 6:21 PM 72 d ago | 7 km | 122 reports |
| 4.0 | 31 km NNW of Covelo, CA · PAGER green | Aug 4, 8:25 PM 73 d ago | 8 km | 7 reports |
| 3.9 | 31 km NNW of Covelo, CA · PAGER green | Aug 5, 6:20 PM 72 d ago | 8 km | 8 reports |
| 3.8 | 12 km NNE of Covelo, CA | Jul 10, 6:05 PM 98 d ago | 10 km | 14 reports |
| 3.8 | 11 km ESE of Willits, CA | Jan 13, 5:51 PM 276 d ago | 9 km | 84 reports |
| 3.7 | 18 km NE of Upper Lake, CA | Mar 26, 1:24 PM 204 d ago | 7 km | 62 reports |
| 3.5 | 15 km N of Brooktrails, CA | Mar 25, 12:20 PM 205 d ago | 9 km | 42 reports |
| 3.4 | 14 km N of Brooktrails, CA | Oct 9, 10:48 PM 7 d ago | 9 km | 13 reports |
| 3.4 | 18 km SE of Redway, CA | Oct 26, 5:06 PM 355 d ago | 7 km | 9 reports |
About this earthquake
How strong was the 15 km NNE of Alder Springs, CA earthquake?
Magnitude 3.9 (mw), minor – felt by people near the epicenter. Depth 14 km. Strongest estimated shaking: intensity 2.9 on the Modified Mercalli scale.
Was it felt?
5 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 2.7.
Were there aftershocks?
2 earthquakes within 100 km in the following two weeks are in our records, the strongest M4.4.
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.