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News Link • Geology

Magma rising in Washington State's Mount St. Helens volcano

• arclein

The roughly 8,300-foot volcano erupted in an explosion of hot ash and gas on May 18, 1980, spewing debris over some 230 square miles and causing more than a billion dollars in property damage. Entire forests were crushed and river systems altered in the blast, which began with a 5.2 magnitude earthquake. "The magma reservoir beneath Mount St. Helens has been slowly re-pressurizing since

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