M4.9 earthquake 71 km SSW of Adak, Alaska
A magnitude 4.9 earthquake struck 71 km SSW of Adak, Alaska at Oct 20, 2:45 PM ET, 37 km deep, light – felt by most people nearby, rattling windows, rarely damage. 2 people reported feeling it.
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| Magnitude | 4.9 mwr |
| Time | 20 Oct 2025, 18:45 UTC |
| Location | 51.296°, -177.072° – 71 km SSW of Adak, Alaska |
| Depth | 37.3 km |
| Felt reports | 2 |
| Max. estimated intensity (MMI) | 3.3 |
| USGS event | us6000ric9 |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 5.5 | 67 km SSW of Adak, Alaska · PAGER green | Nov 23, 3:21 AM 328 d ago | 33 km | 3 reports |
| 5.5 | 122 km SW of Adak, Alaska · tsunami flag · PAGER green | Sep 21, 5:30 AM 390 d ago | 30 km | 4 reports |
| 5.3 | 39 km E of Adak, Alaska · tsunami flag | Jan 24, 4:25 PM 265 d ago | 61 km | 3 reports |
| 5.1 | 149 km WSW of Adak, Alaska · tsunami flag | Sep 11, 6:47 AM 35 d ago | 37 km | – |
| 5.1 | 93 km SSE of Adak, Alaska | Jul 23, 9:03 PM 85 d ago | 10 km | – |
| 5.1 | 40 km E of Adak, Alaska | Feb 1, 7:43 AM 257 d ago | 62 km | 1 report |
| 4.9 | 57 km SSE of Adak, Alaska | Dec 15, 1:03 PM 305 d ago | 42 km | 6 reports |
| 4.9 | 47 km SE of Adak, Alaska | Oct 25, 6:13 AM 356 d ago | 57 km | 1 report |
| 4.6 | 137 km SW of Adak, Alaska | Feb 17, 6:12 PM 241 d ago | 10 km | – |
| 4.5 | 92 km SSE of Adak, Alaska | Jun 4, 1:50 PM 134 d ago | 31 km | – |
| 4.5 | 27 km S of Adak, Alaska | Mar 24, 12:43 PM 206 d ago | 54 km | 1 report |
| 4.5 | 142 km WSW of Adak, Alaska | Jan 19, 7:32 PM 270 d ago | 35 km | – |
About this earthquake
How strong was the 71 km SSW of Adak, Alaska earthquake?
Magnitude 4.9 (mwr), light – felt by most people nearby, rattling windows, rarely damage. Depth 37 km. Strongest estimated shaking: intensity 3.3 on the Modified Mercalli scale.
Was it felt?
2 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 2.5.
Were there aftershocks?
1 earthquakes within 100 km in the following two weeks are in our records, the strongest M4.9.
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.