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Mount St. Helens National Volcanic Monument, WA

US Forest Service

At 8:32 Sunday morning, May 18, 1980, Mount St. Helens erupted. Shaken by an earthquake measuring 5.1 on the Richter scale, the north face of this tall symmetrical mountain collapsed in a massive rock...[more]

Mount St. Helens National Volcanic Monument

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WA

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