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Slides of the July 22, 1980 eruption of Mount St. Helens. Skamania County, Washington. 1980.

Dates

Date Taken
1980-07-22

Summary

These slides 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 begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no.6. The fountain of ash gives rise to a pyroclastic flow that sweeps over the ejecta rampart. [...]

Contacts

Data Owner :
U.S. Geological Survey
Photographer :
Vallance, James W.

Attached Files

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mshj0010.jpg thumbnail 10.26 MB image/jpeg

Material Request Instructions

Available in the U.S. Geological Survey Denver Library Photographic Collection, Mount St. Helens Superset Collection, color transparencies (slides).

Rights

This USGS product is considered to be in the U.S. public domain. For further information on the USGS Information Policies and Instructions, refer to the Copyrights and Credits section on this web page: http://www.usgs.gov/laws/info_policies.html

Additional Information

Identifiers

Type Scheme Key
name photoLibrary mshj0010
number photoLibrary 22625
batch photoLibrary btch225
number_in_book photoLibrary 10ct

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