Mount St. Helen's just before 1980 eruption
Mount St. Helens' summit after several small explosive eruptions. The smaller of the two pit craters was formed first on March 27, 1980. Subsequent eruptions opened the farther crater. The two craters subsequently merged. View looking west. March 30, 1980.
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Photo credit: © Photo Researchers / Alamy / Afripics
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Keywords: 1980, activity, ash, black, cascade, crater, eruption, geology, helen, helens, landscape, mount, mountain, mt, mt., saint, st, st., state, usgs, volcanic, volcano, volcanology, washington, white
