The Deadliest US Volcanic Eruptions
The Worst US Volcanic Eruptions
Mount St. Helens, Washington State
May 18, 1980
Death Toll: 57
The 1980 eruption created a debris avalance of about 0.7 cubic miles in volume, killing 57 and destroying more than 200 homes.
Death Toll: 0
The 1912 Novarupta was the largest volcanic explosion of the 20th Century. Ten times more powerful than the eruption of Mt. St. Helens, it ejected 9.2 square miles of debris.