M5.6 earthquake 172 km ENE of Atka, Alaska
A magnitude 5.6 earthquake struck 172 km ENE of Atka, Alaska at May 22, 8:16 AM ET, 15 km deep, moderate – felt widely, some damage to weak buildings.
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| Magnitude | 5.6 mww |
| Time | 22 May 2026, 12:16 UTC |
| Location | 52.526°, -171.722° – 172 km ENE of Atka, Alaska |
| Depth | 14.8 km |
| Felt reports | 0 |
| Max. estimated intensity (MMI) | 4.9 |
| PAGER alert | green |
| USGS event | us6000szgm |
Other earthquakes nearby this year
| Mag. | Where | When (ET) | Depth | Felt |
|---|---|---|---|---|
| 6.5 | 177 km W of Nikolski, Alaska · tsunami flag · PAGER green | Sep 17, 10:19 AM 29 d ago | 98 km | 8 reports |
| 4.9 | 168 km E of Atka, Alaska · PAGER green | May 18, 5:37 PM 151 d ago | 10 km | – |
| 4.8 | 174 km SW of Nikolski, Alaska | May 25, 1:18 AM 145 d ago | 21 km | – |
| 4.7 | 172 km E of Atka, Alaska | Apr 10, 8:39 PM 189 d ago | 63 km | – |
| 4.7 | 189 km WSW of Nikolski, Alaska · tsunami flag | Nov 9, 4:36 AM 341 d ago | 54 km | – |
| 4.5 | 101 km WSW of Nikolski, Alaska | Sep 20, 9:55 AM 26 d ago | 92 km | – |
| 4.4 | 171 km E of Atka, Alaska | May 22, 4:10 PM 147 d ago | 21 km | – |
| 4.4 | 167 km E of Atka, Alaska | May 22, 8:46 AM 147 d ago | 10 km | – |
| 4.4 | 93 km ENE of Atka, Alaska | Feb 24, 10:34 PM 234 d ago | 157 km | 2 reports |
| 4.4 | 121 km E of Atka, Alaska | Nov 30, 7:24 AM 320 d ago | 73 km | – |
| 4.3 | 185 km E of Atka, Alaska | Nov 9, 9:20 AM 341 d ago | 50 km | – |
| 4.2 | 197 km SW of Nikolski, Alaska | Feb 9, 12:37 AM 250 d ago | 21 km | – |
About this earthquake
How strong was the 172 km ENE of Atka, Alaska earthquake?
Magnitude 5.6 (mww), moderate – felt widely, some damage to weak buildings. Depth 15 km. Strongest estimated shaking: intensity 4.9 on the Modified Mercalli scale.
Was it felt?
No felt reports have been submitted to the USGS so far.
Were there aftershocks?
3 earthquakes within 100 km in the following two weeks are in our records, the strongest M4.8.
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.