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For more than nine hours a vigorous plume of ash erupted, eventually reaching 12 to 15 miles (20-25 kilometers) above sea level. The plume moved eastward at an average speed of 60 miles per hour (95 k...
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For more than nine hours a vigorous plume of ash e...

Mount St. Helens erupted often between 1980 and 1986. An explosive eruption on March 19, 1982, sent pumice and ash 9 miles (14 kilometers) into the air, and resulted in a lahar (the dark deposit on th...
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Mount St. Helens erupted often between 1980 and 19...

July 22, 1980 eruption of Mount St. Helens, with Mount Rainier, Washington, in the background. July 22, 1980.
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July 22, 1980 eruption of Mount St. Helens, with M...

Giant plumes of volcanic ash pour from Mount St. Helens on the day of its major eruption, May 18, 1980.
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Giant plumes of volcanic ash pour from Mount St. H...

View from Johnston Ridge six miles northwest of Mount St. Helens volcanic one day before eruption May 17, 1980 in Washington State. The volcano suffered a catastrophic eruption on May 18, 1980.
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View from Johnston Ridge six miles northwest of Mo...

Roche Ecrite partly cloudy viewpoint on Salazie in Reunion Island
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Roche Ecrite partly cloudy viewpoint on Salazie in...