M5.9 earthquake - 58 km E of Port Alsworth, Alaska
1760 d ago · 21 Dec 2021, 22:42 UTC 58 km E of Port Alsworth, 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 5.9 earthquake struck 58 km E of Port Alsworth, Alaska on 21 Dec 2021, 22:42 UTC at a depth of 151 km.
Earthquakes of this size are classed as Moderate. Can damage poorly built structures close to the epicentre. This was an intermediate-depth earthquake, so shaking is spread over a wider, gentler area.
The nearest town in our records is Anchorage, about 221 km away in Alaska, United States.
Timeline
First reported by USGS
16 Oct 2026, 20:47 UTC
Community
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