Slides of the July 22, 1980 eruption of Mount St. Helens. Skamania County, Washington. 1980.
Dates
Date Taken
1980
Summary
These slides of the July 22, 1980 eruption of Mount St. Helens. Jim Vallance was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:18 approximately; activity after third eruptive pulse. Skamania County, Washington. (Photo by R. Hoblitt, USGS)
Summary
These slides of the July 22, 1980 eruption of Mount St. Helens. Jim Vallance was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:18 approximately; activity after third eruptive pulse. Skamania County, Washington. (Photo by R. Hoblitt, USGS)
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