From USGS Volcanoes:
Flooding along Cowlitz River, north of Mount St. Helens, as a result of the May 18, 1980 eruption. USGS image taken May 20, 1980 by C. Dan Miller.
Tags: #mountsthelens #msh #cvo #cascadesvolcanoobservatory #usgs #volcano #volcanoes #msh1980
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