Mudflows triggered by the eruption of Mt. St. Helens in 1980 caused massive destruction.
Article: Mountains of Fire | Sidebar One: Volcanoes of North America | Sidebar Two: Montserrat | Sidebar Three: Other Planets | ANIMATIONHell's Crust: Our Everchanging Planet | The Restless Planet: Earthquakes Out of the Inferno: Volcanoes | Waves of Destruction: Tsunamis
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