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M5.4 earthquake - 185 km WSW of Adak, Alaska

Name: M5.4 earthquake - 185 km WSW of Adak, Alaska
Start: 2021-02-28T10:44:50.457+00:00
Location: 185 km WSW of Adak, Alaska

2056 d ago · 28 Feb 2021, 10:44 UTC 185 km WSW of Adak, 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 5.4 earthquake struck 185 km WSW of Adak, Alaska on 28 Feb 2021, 10:44 UTC at a depth of 22 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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