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This product includes rose diagrams and tables of wind patterns at volcanoes listed in the Smithsonian Institution’s Volcanoes of the World Database. At each volcano, the speed and direction of wind above the volcano were read from output of the NCEP/NCAR Reanalysis 1 model, at twice-daily intervals from January 1, 1990 to December 28, 2009. These results were then plotted as 20 wind rose diagrams, divided into four seasons and five elevation intervals, and as one summary plot for year-round winds at 0-5 km elevation above sea level. Rose petals indicate the downwind direction of the wind vector. These rose diagrams are wrapped into a single zip file for each volcano. Also included in the zip file are five...
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This data release contains digital video files from the USGS of Mount St. Helens volcano in the months leading up to the cataclysmic eruption on May 18, 1980 as well as the first two years of the eruption. Original videos were collected on an assortment of cameras and film types, including 16 mm, 8 mm and Super 8 mm during USGS field campaigns on the ground as well as from the air and on time-lapse camera stations setup around the volcano. Videos capture USGS crews collecting data as well as an assortment of volcanic processes, including dome growth, ash emissions, rockslides, and pyroclastic flows. These film records represent a tremendous resource to the volcanology community as they represent visual recordings...


    map background search result map search result map Historical video footage of Mount St. Helens volcano, Washington, 1980-1982 Historical video footage of Mount St. Helens volcano, Washington, 1980-1982