M5.4 earthquake - 288 km WSW of Adak, Alaska
1978 d ago · 17 May 2021, 20:25 UTC 288 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 288 km WSW of Adak, Alaska on 17 May 2021, 20:25 UTC at a depth of 31 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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