EarthquakeModerate

M4.0 earthquake - 69 km SSE of Atka, Alaska

Name: M4.0 earthquake - 69 km SSE of Atka, Alaska
Start: 2021-10-28T18:38:10.488+00:00
Location: 69 km SSE of Atka, Alaska

1815 d ago · 28 Oct 2021, 18:38 UTC 69 km SSE of Atka, Alaska

What happened

A magnitude 4 earthquake struck 69 km SSE of Atka, Alaska on 28 Oct 2021, 18:38 UTC at a depth of 53 km.

Earthquakes of this size are classed as Light. Widely felt nearby; objects may shake or fall. Significant damage is unusual. This was a shallow earthquake, which tends to be felt more strongly at the surface.

Timeline

First reported by USGS
17 Oct 2026, 10:25 UTC

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