M6.4 earthquake - 124 km SSW of Attu Station, Alaska

What happened

A magnitude 6.4 earthquake struck 124 km SSW of Attu Station, Alaska on 31 Jul 1923, 15:07 UTC at a depth of 15 km.

Earthquakes of this size are classed as Strong. Can cause damage in populated areas up to tens of kilometres away. This was a shallow earthquake, which tends to be felt more strongly at the surface.