Mount St. Helens Eruption: Facts & Information
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Picturesque Mount St. Helens erupted on May 18, 1980 and remains the most destructive example of volcanic activity in the United States.Mount St. Helens Eruption: Facts & Information
Picturesque Mount St. Helens erupted on May 18, 1980 and remains the most destructive example of volcanic activity in the United States. Read more