18 May 1980: Mount St. Helens Erupts in Catastrophic Volcanic Explosion
On May 18, 1980, Mount St. Helens in Washington State erupted with catastrophic force, becoming one of the most significant volcanic events in North American history. The eruption killed 57 people, flattened 230 square miles of forest, and blasted more than a cubic mile of rock and ash into the atmosphere. The mountain had been…