Collossal Mt. St. Helen's Pyroclastic Flow and Eruption

This video shows excellent footage of the pyroclastic flow produced by the collosal eruption of Mt. St. Helens in 1980.
It also dramatizes the complete devastation produced by a pyroclastic flow.
The video also shows amazing slow motion footage of the enourmous landslide and ensuing eruption.
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Maddalena Environmental Inc.
Al Maddalena