WORLD'S LARGEST AVALANCHE
THE LONGEST LIST OF THE LONGEST STUFF AT THE LONGEST DOMAIN NAME AT LONG LAST

What was the world's largest avalanche?

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

The eruption had the energy of 1000 Hiroshima-sized bombs and resulted 2/3 a cubic mile of the north slope sliding down into the valley at over 150 miles per hour.

This is enough material to cover Washington, D.C. 14 feet deep.

The avalanche  resulted in deposits as deep as 600 feet and as far away as 15 miles, the 23 square mile valley was covered with an average of 150 feet of debris.

Mount St. Helens Before & After the Avalanche

 

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