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What is the worst avalanche on record?

In: Avalanches [Edit categories]

Answer:

The world's largest recorded avalanche occurred on May 18, 1980 when Mount St. Helens erupted.
A few facts:

The eruption had the energy of 1000 Hiroshima-sized bombs
It resulted 2/3 a cubic mile of the north slope sliding down into the valley at over 150 miles per hour.
Debris deposits as deep as 600 feet and as far away as 15 miles
The adjacent 23 square mile valley was covered with an average of 150 feet of debris.

First answer by Woodwose. Last edit by Woodwose. Contributor trust: 788 [recommend contributor ]. Question popularity: 11 [recommend question].

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