M4.0 earthquake 60 km W of Happy Valley, Alaska
A magnitude 4.0 earthquake struck 60 km W of Happy Valley, Alaska at Dec 31, 3:36 PM ET, 117 km deep, light – felt by most people nearby, rattling windows, rarely damage. 3 people reported feeling it.
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| Magnitude | 4.0 ml |
| Time | 31 Dec 2025, 20:36 UTC |
| Location | 60.039°, -152.796° – 60 km W of Happy Valley, Alaska |
| Depth | 117.3 km |
| Felt reports | 3 |
| Max. estimated intensity (MMI) | 2.3 |
| USGS event | ak2025ztthsw |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 4.9 | 13 km SSE of Clam Gulch, Alaska · PAGER green | Jun 26, 9:15 PM 112 d ago | 55 km | 420 reports |
| 4.5 | 34 km ENE of Port Alsworth, Alaska · tsunami flag | Jan 6, 3:08 AM 284 d ago | 189 km | 105 reports |
| 4.2 | 37 km WSW of Anchor Point, Alaska | Jul 12, 6:11 PM 96 d ago | 79 km | 26 reports |
| 4.2 | 61 km E of Pedro Bay, Alaska | Jul 12, 2:00 AM 97 d ago | 107 km | 53 reports |
| 4.1 | 32 km W of Anchor Point, Alaska | May 10, 2:59 PM 159 d ago | 95 km | 20 reports |
| 4.1 | 30 km W of Anchor Point, Alaska | Mar 31, 11:44 AM 199 d ago | 83 km | 19 reports |
| 4.1 | 33 km E of Port Alsworth, Alaska | Oct 13, 12:51 PM 368 d ago | 188 km | 14 reports |
| 4.0 | 44 km W of Happy Valley, Alaska | Jul 6, 1:36 AM 103 d ago | 108 km | 71 reports |
| 4.0 | 42 km WNW of Nanwalek, Alaska | May 14, 9:06 AM 155 d ago | 94 km | – |
| 4.0 | 52 km WNW of Nanwalek, Alaska | Oct 8, 3:33 AM 374 d ago | 94 km | 8 reports |
| 3.9 | 25 km NW of Anchor Point, Alaska | Aug 29, 8:02 AM 48 d ago | 90 km | 19 reports |
| 3.9 | 59 km NE of Pedro Bay, Alaska | Aug 11, 6:26 PM 66 d ago | 147 km | 2 reports |
About this earthquake
How strong was the 60 km W of Happy Valley, Alaska earthquake?
Magnitude 4.0 (ml), light – felt by most people nearby, rattling windows, rarely damage. Depth 117 km. Strongest estimated shaking: intensity 2.3 on the Modified Mercalli scale.
Was it felt?
3 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 2.2.
Were there aftershocks?
1 earthquakes within 100 km in the following two weeks are in our records, the strongest M4.5.
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.