EarthquakeModerate

M4.0 earthquake - 51 km SSE of Adak, Alaska

Name: M4.0 earthquake - 51 km SSE of Adak, Alaska
Start: 2020-09-16T14:57:24.631+00:00
Location: 51 km SSE of Adak, Alaska

2222 d ago · 16 Sept 2020, 14:57 UTC 51 km SSE of Adak, Alaska

What happened

A magnitude 4 earthquake struck 51 km SSE of Adak, Alaska on 16 Sept 2020, 14:57 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, 09:57 UTC

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