Mount St. Helens fourth eruption in 1980. Skamania County, Washington.
Dates
Date Taken
1980-06-22
Summary
Caption: Mount St. Helens dusts Washington state with fourth eruption. This June 22, 1980 scene looking northerly at Washington state's Mount St. Helens volcano shows the fourth significant eruption of the Cascade Mountain Range volcano since it began awakening in late March, 1980 after 123 years of quiet. The effects of air movement at higher elevations can be seen as the ash cloud begins to broaden and the heavier ash particles begin to fall back to the ground. During the May 18, 1980 main eruption, the mountain ejected about 1 cubic kilometer of ash and rock which fell over 11 western and central states. The force of the main eruption blast removed about 5,000 feet from the north face of the mountain and knocked down trees on a [...]
Summary
Caption: Mount St. Helens dusts Washington state with fourth eruption. This June 22, 1980 scene looking northerly at Washington state's Mount St. Helens volcano shows the fourth significant eruption of the Cascade Mountain Range volcano since it began awakening in late March, 1980 after 123 years of quiet. The effects of air movement at higher elevations can be seen as the ash cloud begins to broaden and the heavier ash particles begin to fall back to the ground. During the May 18, 1980 main eruption, the mountain ejected about 1 cubic kilometer of ash and rock which fell over 11 western and central states. The force of the main eruption blast removed about 5,000 feet from the north face of the mountain and knocked down trees on a 185 square-mile area.
Available in the U.S. Geological Survey Denver Library Photographic Collection, 2010 DENPH0011, PIO Collection.
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