Mt. St. Helens - 1981

Mt. St. Helens from the east in 1981. The blast zone from May 18, 1980 eruption is the barren area extending north from the volcano. The thin cloud layer stretching from the summit of the volcano over the blast zone resulted from moist air from the Pacific Ocean that condensed due to warm air emanating from the crater. Photo by R. Forrest Hopson.

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