View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. Mount St. Helens, Cowlitz County, Washington. 1980.
Dates
Date Taken
1980-05-18
Summary
Index card: View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. This mudflow took nine hours to build in size sufficient to reach through the blasted material and move downstream to the Cowlitz River valley. The mudflow on the South Fork Toutle River arrived at Castle Rock three hours after the eruption of Mount St. Helens and that from the North Fork by 12 hours. Cowlitz County, Washington. May 18, 1980. (Photo by Harry Glicken, USGS/CVO).
Summary
Index card: View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. This mudflow took nine hours to build in size sufficient to reach through the blasted material and move downstream to the Cowlitz River valley. The mudflow on the South Fork Toutle River arrived at Castle Rock three hours after the eruption of Mount St. Helens and that from the North Fork by 12 hours. Cowlitz County, Washington. May 18, 1980. (Photo by Harry Glicken, USGS/CVO).
Available in the U.S. Geological Survey Denver Library Photographic Collection, Mount St. Helens Slide Collection, Cascades Volcano Observatory (CVO), A-E Collection.
Rights
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