M4.0 earthquake 230 km W of Adak, Alaska
A magnitude 4.0 earthquake struck 230 km W of Adak, Alaska at Mar 18, 12:57 PM ET, 88 km deep, light – felt by most people nearby, rattling windows, rarely damage.
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| Magnitude | 4.0 mb |
| Time | 18 Mar 2026, 16:57 UTC |
| Location | 51.691°, -179.965° – 230 km W of Adak, Alaska |
| Depth | 88.0 km |
| Felt reports | 0 |
| Max. estimated intensity (MMI) | 2.3 |
| USGS event | us6000sh8c |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 6.1 | Rat Islands, Aleutian Islands, Alaska | May 9, 12:42 AM 161 d ago | 16 km | – |
| 5.8 | 296 km WSW of Adak, Alaska · PAGER green | May 9, 12:42 AM 161 d ago | 37 km | – |
| 5.0 | 212 km WSW of Adak, Alaska · PAGER green | Jun 18, 9:58 AM 120 d ago | 31 km | – |
| 5.0 | 209 km WSW of Adak, Alaska | Apr 18, 9:15 AM 181 d ago | 38 km | – |
| 4.9 | 204 km WSW of Adak, Alaska | Jun 13, 7:24 AM 125 d ago | 48 km | – |
| 4.7 | 295 km WSW of Adak, Alaska | May 8, 4:03 PM 161 d ago | 35 km | – |
| 4.7 | 294 km WSW of Adak, Alaska | Apr 20, 5:54 AM 179 d ago | 35 km | – |
| 4.7 | 225 km W of Adak, Alaska | Feb 19, 1:37 AM 240 d ago | 127 km | – |
| 4.6 | 181 km WSW of Adak, Alaska | Apr 5, 5:19 AM 194 d ago | 35 km | – |
| 4.5 | 240 km WSW of Adak, Alaska | Oct 11, 9:51 AM 370 d ago | 35 km | – |
| 4.4 | 275 km W of Adak, Alaska | Oct 11, 8:16 AM 5 d ago | 95 km | – |
| 4.4 | 259 km WSW of Adak, Alaska | Sep 27, 6:30 AM 19 d ago | 18 km | – |
About this earthquake
How strong was the 230 km W of Adak, Alaska earthquake?
Magnitude 4.0 (mb), light – felt by most people nearby, rattling windows, rarely damage. Depth 88 km. Strongest estimated shaking: intensity 2.3 on the Modified Mercalli scale.
Was it felt?
No felt reports have been submitted to the USGS so far.
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.