Filters: Tags: Mount St. Helens (X)
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Oblique aerial view of Coldwater Lake, which resulted when the debris avalanche of May 18, 1980, filled the Toutle River Valley, damming a side channel. Skamania and Cowlitz Counties, Washington. October 12, 1983.
Categories: Image;
Tags: CVO Cascade Volcano Observatory Collection,
Mount St. Helens,
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Christina Heliker measuring at Don's Place site. Skamania County, Washington. August 17, 1982.
Categories: Image;
Tags: CVO Cascade Volcano Observatory Collection,
Mount St. Helens,
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Surge of flood water coming down Smith Creek blast zone during first major rain after the May 18, 1980, eruption of Mount St. Helens. Skamania County, Washington. November 6, 1980.
Categories: Image;
Tags: CVO Cascade Volcano Observatory Collection,
Mount St. Helens,
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Index card: Mount St. Helens in eruption: aerial view with upper part of volcano and lower part of eruptive column on right. Cloud-covered countryside on left. 0950 hrs PDT. Skamania County, Washington. May 18, 1980.
Near view of beginning of floor deformation of Mount St. Helens. Offset of orange line shows location of deformation. Skamania County, Washington. August 1982.
Categories: Image;
Tags: CVO Cascade Volcano Observatory Collection,
Mount St. Helens,
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Phreatic explosion of Mount St. Helens; from the southwest. Ash and steam. Skamania County, Washington. May 7, 1980.
Dogs Head, north flank of Mount St. Helens. 1,600-year-old basalts. Skamania County, Washington. August, 1964.
View to west of Mount St. Helens pumice flows and temperature site. Note geologists and fumaroles. Skamania County, Washington. May 23, 1980.
Temporary location on Mount St. Helens May 18 pumice flows north of amphitheater. Skamania County, Washington. May 23, 1980.
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Tags: Mount St. Helens,
Mount St. Helens May 18, 1980,
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Oblique aerial view showing the pattern of thrust faults in Mount St. Helens southwest crater floor. Thrusts are directed away from the dome, which is off the top of the photo. The thrust faults have lobate frontal scarps facing away from the dome and are bounded by tear faults which are the radial cracks noted in the previous several slides. The dark area at the bottom of the slide is dirty snow. The width of the view is on the order of a hundred meters or so. Skamania County, Washington. June 24, 1981.
Categories: Image;
Tags: Aerial,
Mount St. Helens,
Mount St. Helens 1981,
Mount St. Helens msh1981,
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Spirit Lake, taken from debris island looking south toward Mount St. Helens. Diane McKnight, U.S. Geological Survey, collecting water sample from Spirit Lake. Blown down logs on debris island and floating in Spirit Lake. Skamania County, Washington. September 11, 1980.
Categories: Image;
Tags: Mount St. Helens,
Mount St. Helens 1980 September,
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Mount St. Helens blast zone. New growth of fireweed on periphery of blast zone near Elk Creek. Cowlitz County, Washington. September 10, 1980.
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Tags: Mount St. Helens,
Mount St. Helens 1980 September,
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Pre-eruption aerial view eastward from over the northwest flank of Mount St. Helens, Spirit Lake in the middle ground. Skamania County, Washington.n.d.
Categories: Image;
Tags: Adsit R.R. Collection Mount St. Helens msh1980,
Mount St. Helens,
photo print
Scientists measuring pressure and air temperature in Mount St. Helens' crater during EDM measurements from Harrys Ridge. Skamania County, Washington. August 1981.
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Tags: CVO Cascade Volcano Observatory Collection,
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"Piping" through the Mount St. Helens debris avalanche. Geologist for scale. Skamania County, Washington. October 1, 1983.
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Tags: CVO Cascade Volcano Observatory Collection,
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USGS Water Resources Division scientists using airboat for cross-section measurements on the Toutle River. Cowlitz County, Washington. October 1982.
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Tags: CVO Cascade Volcano Observatory Collection,
Mount St. Helens,
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Drawing of Mount St. Helens bulge.
Categories: Image;
Tags: Adsit R.R. Collection Mount St. Helens msh1980,
Mount St. Helens,
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On May 18, 1980, Mount St. Helens, Washington, exploded in a spectacular and devastating eruption that resulted in previously unimaginable events that drastically altered the mountain and the surrounding area. One unprecedented event was the collapse of the summit and north flank of the volcano forming a huge landslide known as the ‘debris avalanche’ with a total volume of about 2.5 km3 (3.3 billion cubic yards). The debris avalanche swept around and up ridges to the north, but most of it turned westward as far as 23 km (14 mi) down the valley of the North Fork Toutle River and formed a hummocky deposit. This had a profound effect on the topography of the area, including transforming the summit cone of the volcano...
Near view of rain gage set up on the pumice plain near Mount St. Helens. A network of weighing bucket and tipping bucket rain gages was set up in 1980 around Castle, Coldwater, and Spirit Lakes to assess rainfall patterns around Mount St. Helens. The information is used to help assess lake levels and fill. Some data are telemetered back to Vancouver, Washington; other gages are serviced manually once a month. Skamania County, Washington. October 15, 1981. Published in U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984, p.121.
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Devastation along the Cowlitz River resulting from the May 18, 1980, lahars. Garage? half-buried by mudflow. Cowlitz County, Washington. July 15, 1980.
Categories: Image;
Tags: CVO Cascade Volcano Observatory Collection,
Mount St. Helens,
Photographers,
Volcanoes,
color transparency (slides)
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