Volcano Eruption Mount St. Helens May 18, 1980 USGS

Volcano Eruption Mount St. Helens May 18, 1980 USGS Video – 36 years ago today, Mt. St. Helens erupted. USGS scientists recount their experiences before, during and after the May 18, 1980 eruption of Mount St. Helens. Loss of their colleague David A. Johnston and 56 others in the eruption cast a pall over one of the most dramatic geologic moments in American history.

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