M5.4 earthquake - 43 km SSE of Old Harbor, Alaska
1333 d ago · 21 Feb 2023, 05:35 UTC 43 km SSE of Old Harbor, 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 43 km SSE of Old Harbor, Alaska on 21 Feb 2023, 05:35 UTC at a depth of 12 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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