Pathways2.0: Grade 6 Volcano: The Eruption and Healing of Mount St. Helens Tradebook

May 18, 1980, 8:32 A.M.: An earthquake suddenly triggered an avalanche on Mount St. Helens, a volcano in southern Washington State. Minutes later, Mount St. Helens blew the top off its peak and exploded into the most devastating volcanic eruption in U.S. history. What caused the eruption? What was left when it ended? What did scientists learn in its aftermath?