View of Mount St. Helens eruption on July 22, 1980. Skamania County, Washington.
Dates
Date Taken
1980-07-22
Summary
Typed caption accompanying slides: View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance) Note: Mount St. Helens - List of color transparencies (slides) of the July 22, 1980 eruption. The following slides (1-114) of the July 22, 1980 eruption of Mount St. Helens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken and Rick Hoblitt, who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They began at 17:14, 18:30 and 19:02 PDT. Additional note: Slides no. 28 through no. 37 show second eruptive pulse. This sequence was taken while moving counter clockwise from the southwest to the [...]
Summary
Typed caption accompanying slides: View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance)
Note: Mount St. Helens - List of color transparencies (slides) of the July 22, 1980 eruption. The following slides (1-114) of the July 22, 1980 eruption of Mount St. Helens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken and Rick Hoblitt, who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They began at 17:14, 18:30 and 19:02 PDT.
Additional note: Slides no. 28 through no. 37 show second eruptive pulse. This sequence was taken while moving counter clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ash cloud rising from the pyroclastic flows.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Mount St. Helens Superset album, Photos stacks slides collection area.
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