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Index card: Aerial view of debris flow in the Toutle River basin, showing erosion from snowmelt, and several small brightly colored (turquoise, yellow, brown) pools of water. Cowlitz County, Washington. May 1, 1981.
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Album caption: Oblique aerial view of Mount St. Helens amphitheater as viewed from the north on July 22, 1980, sequence (9A-G) (photos nos. 17-23), showing the formation of a pyroclastic density flow during the early part of the third eruptive pulse. A, 1900:59; B, 1901:03 PDT, timed photographs by the author; C, 1901:08 PDT, photo by Harry X. Glicken, time from comparison with a timed photograph that is not shown; D,E,F,G, untimed sequence taken within 30 seconds after C, by Harry X. Glicken. Skamania County. Washington. (See also MSH-July 22, 1980 nos. 69ct-75ct) Published as figure 9-D in U.S. Geological Survey. Professional paper 1335. 1986. Index card unavailable.
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Typed caption accompanying slide: 19:01 pyroclastic flow continues its advance as helicopter moves west. Skamania County, Washington. (Photo by H. Glicken) Note: Slide numbers 43 - 50 were taken at 19:01 and show the pyroclastic flow as it advances northward. Skamania County, Washington. July 22, 1980. Slide number 51 was taken at 19:02. Slide numbers 52 - 55 were taken at 19:03. Slide numbers 56 - 57 were taken at 19:04. Slide numbers 58 and 59 were taken at 19:04 and 19:05. Slide numbers 60 - 62 are views of the eruption and were taken at 19:06. Slide no. 52, msh_vjw00052_ct, is highlighted in this photo record. Slide no. 52 typed caption: View of eruption at 19:03, the plume develops a mushroom-like...
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Index card (No. 100ct-112ct): Mount St. Helens in eruption on August 7, 1980. Skamania County, Washington. August 7, 1980. Photo 101ct published as Figure 293-A and photo 107ct published as Figure 293-B in U.S. Geological Survey. Professional Paper 1250. 1981.
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Index card: Aerial view of May 18, 1980 eruption of Mount St. Helens from the south. Skamania County, Washington. (Photo by J. Rosenbaum)
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Index card: Three other Cascade volcanoes are visible from Mount St. Helens - Mt. Adams to the east. Any one of these Cascade peaks has the potential for becoming another active volcano. Yakima County, Washington. September 23, 1983.
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Index card: Plot of number of magnitude 3 and greater earthquakes per hour, March 10 through May 29, 1980. Skamania County, Washington.
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Index card: Aerial view of Camp Baker and mudflows in North Fork Toutle River on May 20, 1980. Cowlitz County, Washington.
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Index card: Oblique aerial view to the north showing the "two-tone" Mount St. Helens - an appearance produced by prevailing easterly winds during the initial activity of Mount St. Helens. Left half of mountain is white snow; right half is colored gray by ash cover. Mount Rainier visible in the background. Skamania County, Washington. March 30, 1980. Portion published on page 5 in U.S. Geological Survey Eruptions of Mount St. Helens: Past, Present, and Future by Robert I. Tilling. 1984.
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Index card, no. 217ct-264ct: Group of oblique aerial views of Mount St. Helens in eruption; time taken runs from 1326 hrs to 1815 hrs. Photos include near and distant views, eruption and eruption plume, pyroclasitc flows, ash. Skamania County, Washington. May 18, 1980. (Various amounts of plane wing or window frame visible in most views).
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Index card: Spirit-level tilt station next to Mount St. Helens dome. Skamania County, Washington. May 20, 1982. (Photo by Donald A. Swanson)
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Album caption, slide description, and slide index card: MSH-Branch of Exhibits no. 12cp: Mount St. Helens. Aerial view of mudflow deposits and damage along the north bank, North Fork Toutle River. Cowlitz County, Washington. May 26, 1980. (Photo by D. Dzurisin) (Same as MSH-BE-VOLC-0026ct) (msh_boe_volc0026_ct).