M7.1 earthquake - 24 km E of Attu Station, Alaska

What happened

A magnitude 7.1 earthquake struck 24 km E of Attu Station, Alaska on 16 Apr 1940, 06:43 UTC at a depth of 30 km.

Earthquakes of this size are classed as Major. Can cause serious damage over large areas. This was a shallow earthquake, which tends to be felt more strongly at the surface.