EarthquakeMajor

M6.4 earthquake - 65 km WNW of Adak, Alaska

Name: M6.4 earthquake - 65 km WNW of Adak, Alaska
Start: 1987-03-21T10:41:35.97+00:00
Location: 65 km WNW of Adak, Alaska

14454 d ago · 21 Mar 1987, 10:41 UTC 65 km WNW of Adak, Alaska

What happened

A magnitude 6.4 earthquake struck 65 km WNW of Adak, Alaska on 21 Mar 1987, 10:41 UTC at a depth of 93 km.

Earthquakes of this size are classed as Strong. Can cause damage in populated areas up to tens of kilometres away. This was an intermediate-depth earthquake, so shaking is spread over a wider, gentler area.

Timeline

First reported by USGS
16 Oct 2026, 20:46 UTC

Community

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