Photos show Mount St. Helens, the most disastrous volcanic eruption in US history 44 years ago
On May 18, 1980, an earthquake caused Mount St. Helens to erupt, leading to widespread destruction.
Austin Post/USGS
- When Mount St. Helens erupted on May 18, 1980, it caused enormous devastation.
- The eruption triggered mudslides, an explosion, and plumes of ash that did enormous damage.
- The death of 57 people led to large changes in how the US monitors and prepares for eruptions.
On May 18, 1980, Don Swanson placed a frenzied call to his wife to let her know that he was OK.
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