Final answer:
Mt. St. Helens is an active volcano that had a major eruption in 1980. It has since had minor eruptions and is now considered somewhat dormant.
Step-by-step explanation:
Mt. St. Helens is an active volcano located in the state of Washington, USA. It had a major eruption on May 18, 1980, which caused the top of the volcano to collapse, forming a large crater nearly a mile deep. Since then, it has had minor eruptions but is considered more dormant compared to its active phase.
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