M6.9 earthquake - Sea of Okhotsk

What happened

A magnitude 6.9 earthquake struck Sea of Okhotsk on 29 Jan 1971, 21:58 UTC at a depth of 539 km.

Earthquakes of this size are classed as Strong. Can cause damage in populated areas up to tens of kilometres away. This was a deep earthquake; shaking at the surface is usually weak for its size.