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Aerial view of explosive Mount St. Helens shorty after eruption. Skamania County, Washington. May 18, 1980.


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Caption: Explosive Mount St. Helens. Aerial view from the west of Mount St. Helens volcano, Washington, shortly after the violent eruption of Sunday morning, May 18, 1980. USGS scientists estimate that the minimum volume of ash and rock ejected during the May 18 eruption amounted to about 1 cubic kilometer (1.3 billion cubic yards) of material. The estimate is based on an assumption that the new crater formed by the blast at Mount St. Helens measures about 1 kilometer wide, 2 kilometers long, and at least 0.3 kilometers deep. If the May 18 eruption did produce as much as estimated, USGS sceintists say, the volume would be about equal to the estimated volume of volcanic materials ejected by Mount St. Helens in 1500 A.D., and about [...]


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U.S. Geological Survey

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PIO_80_126a.jpg thumbnail 4.72 MB image/jpeg
PIO_80_126a.tif 46.63 MB image/geotiff

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Available in the U.S. Geological Survey Denver Library Photographic Collection, 2010 DENPH0011, PIO Collection.


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Photo Number PIO_80_126a

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