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Following the May 2005 acid crater lake flood at Chiginagak volcano, DGGS has been monitoring crater lake water that flows into Indecision Creek, Mother Goose Lake, and the King Salmon River.This data table provides information on water samples collected between 2005 and 2011 near Chiginagak volcano, including:sample ID, latitude, longitude, location description, pH, and cation and anion chemistry results.
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This data lists the historically active volcanoes of Alaska and the year of the last major eruptive event. The volcanoes listed meet at least one of the following criteria since 1700 CE: (1) documented, unquestioned eruption, or (2) a strongly suspected eruption, often an eruption documented in the historical account with very little information (current geologic knowledge must not contradict the eruption account), or (3) persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within ~10 degrees C of the boiling point, or (4) significant, measured, volcanic-related, non-eruptive deformation, (5) documented earthquake swarm with strongly...
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Index card: Gas and ash emission, Mount St. Helens, viewed from the north, with geologist in foreground with monitoring equipment. Skamania County, Washington. April 6, 1983. (Photo by Lyn Topinka)
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Index card: Small gas and ash emission as viewed from up near the dome. Skamania County, Washington. May 20, 1982. (Photo by Dan Dzurisin)
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Slide description: Oblique aerial view of southwest flank of Mount St. Helens. Ash being deflated from flank by strong winds. Skamania County, Washington. April 2, 1980. (Plane wing visible at left).
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Slide description: Similar oblique aerial view of southeast side of Mount St. Helens - ash being deflated from southwest flank. Skamania County, Washington. April 2, 1980. (Part of plane wing visible at right).
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Index card: Oblique aerial view of pyroclastic flows of July 22, 1980 eruption, one lobe on top of the other. Skamania County, Washington. September 30, 1980. (Photo by Lyn Topinka)
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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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Caption from slide: Why make predictions? No index card available.
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Slide description: Near oblique aerial view of craters and ash-rich eruption plumes. Skamania County, Washington. April 2, 1980. (Part of plane visible at center and lower right). No index card available.
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Index card: View along Smith Creek showing tree blowdown, singed trees, and green trees which missed the blast. Skamania County, Washington. April 26, 1982. (Photo by Lyn Topinka)
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Index card: View of the Plains of Abraham, on the east flanks of Mount St. Helens. Skamania County, Washington. June 1978. (Photo by Lyn Topinka)
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Index card: Lahar, from May 18, 1980, which flowed down the Muddy River drainage, southeast flank of Mount St. Helens. Skamania County, Washington. September 24, 1980. (Photo by Lyn Topinka)


map background search result map search result map Historically active volcanoes of Alaska Summit crater lake observations, and the location, chemistry, and pH of water samples near Mount Chiginagak volcano, Alaska: 2004-2011 Mount St. Helens. Skamania County, Washington. 1982. Mount St. Helens. Skamania County, Washington. 1983. Oblique aerial view of southwest flank of Mount St. Helens. Skamania County, Washington. 1980. Oblique aerial view of southeast side of Mount St. Helens. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1982. Near oblique aerial view of Mount St. Helens craters and ash-rich eruption plumes. Skamania County, Washington. 1980. Oblique aerial view down into Mount St. Helens crater showing debris at bottom. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1978. Oblique aerial view showing both craters at Mount St. Helens summit and septum separating them. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1982. Summit crater lake observations, and the location, chemistry, and pH of water samples near Mount Chiginagak volcano, Alaska: 2004-2011 Mount St. Helens. Skamania County, Washington. 1982. Mount St. Helens. Skamania County, Washington. 1983. Oblique aerial view of southwest flank of Mount St. Helens. Skamania County, Washington. 1980. Oblique aerial view of southeast side of Mount St. Helens. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1982. Near oblique aerial view of Mount St. Helens craters and ash-rich eruption plumes. Skamania County, Washington. 1980. Oblique aerial view down into Mount St. Helens crater showing debris at bottom. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1978. Oblique aerial view showing both craters at Mount St. Helens summit and septum separating them. Skamania County, Washington. 1980. Mount St. Helens. Skamania County, Washington. 1982. Historically active volcanoes of Alaska