Scenic view of Mount St. Helens after the July 22 eruption, looking northeast at ash plume at dusk. Skamania County, Washington. 1980.

Typed caption accompanying slides and index card: Scenic view, at 20:54 hours (PDT), looking northeast at ash plume at dusk. Skamania County, Washington. (Photo by Richard P. Hoblitt). 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.