Time lapse of August 7, 1980, eruption of Mount St. Helens. Skamania County, Washington. 1980.
Dates
Date Taken
1980-08-07
Summary
Index card: Mount St. Helens eruption of August 7, 1980. (Geologists in foreground for scale against ash cloud). Skamania County, Washington. Figure caption: Development of pyroclastic flow during 1623 PDT (Pacific Daylight time) eruption on August 7, viewed from Coldwater Ridge, about 8 km north of Mount St. Helens. After motion of pyroclastic flow has ceased, at about 1631 PDT, associated ash cloud billows toward viewpoint, and impending fallout from it and the Plinian column necessitated departure of observers. Two geologists preparing for departure in foreground. Skamania County, Washington. August 7, 1980. Published as Figure 293-D, U.S. Geological Survey Professional paper 1250.
Summary
Index card: Mount St. Helens eruption of August 7, 1980. (Geologists in foreground for scale against ash cloud). Skamania County, Washington.
Figure caption: Development of pyroclastic flow during 1623 PDT (Pacific Daylight time) eruption on August 7, viewed from Coldwater Ridge, about 8 km north of Mount St. Helens. After motion of pyroclastic flow has ceased, at about 1631 PDT, associated ash cloud billows toward viewpoint, and impending fallout from it and the Plinian column necessitated departure of observers. Two geologists preparing for departure in foreground. Skamania County, Washington. August 7, 1980.
Published as Figure 293-D, U.S. Geological Survey Professional paper 1250.
Available in the U.S. Geological Survey Denver Library Photographic Collection, Photos stacks slides collection area, Mount St. Helens Collection, Lipman, P.W. album.
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