EarthquakeModerate

M4.0 earthquake - 54 km ESE of Nikolski, Alaska

Name: M4.0 earthquake - 54 km ESE of Nikolski, Alaska
Start: 2021-12-21T16:59:50.672+00:00
Location: 54 km ESE of Nikolski, Alaska

1761 d ago · 21 Dec 2021, 16:59 UTC 54 km ESE of Nikolski, Alaska

What happened

A magnitude 4 earthquake struck 54 km ESE of Nikolski, Alaska on 21 Dec 2021, 16:59 UTC at a depth of 35 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, 10:29 UTC

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