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M5.6 earthquake - 258 km NW of Attu Station, Alaska

Name: M5.6 earthquake - 258 km NW of Attu Station, Alaska
Start: 2021-12-29T03:57:32.869+00:00
Location: 258 km NW of Attu Station, Alaska

1752 d ago · 29 Dec 2021, 03:57 UTC 258 km NW of Attu Station, Alaska

A tsunami flag was raised for this event. This does not mean a tsunami occurred. Always follow official tsunami warning centres and local authorities.

What happened

A magnitude 5.6 earthquake struck 258 km NW of Attu Station, Alaska on 29 Dec 2021, 03:57 UTC at a depth of 10 km.

Earthquakes of this size are classed as Moderate. Can damage poorly built structures close to the epicentre. This was a shallow earthquake, which tends to be felt more strongly at the surface.

Timeline

First reported by USGS
16 Oct 2026, 20:47 UTC

Community

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Nearby in the last 30 days

No other events recorded within about 300 km in the last 30 days.