May 18 in American History

May 18, 1980 — Mount St. Helens erupts

The Washington State volcano exploded in the most destructive eruption in U.S. history, flattening 230 square miles of forest, killing 57 people, and blasting ash across the country. It was a stark reminder that beneath America's settled landscape lies a wild and powerful geology that no amount of civilization fully tames.

Common Questions About May 18

What happened on May 18 in American history?

In 1980: Mount St. Helens erupts. The Washington State volcano exploded in the most destructive eruption in U.S.

Why is May 18 significant?

The Washington State volcano exploded in the most destructive eruption in U.S. history, flattening 230 square miles of forest, killing 57 people, and blasting ash across the country. It was a stark reminder that beneath America's settled landscape lies a wild and powerful geology that no amount of civilization fully tames.

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