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Caption: Huge crater left by Mount St. Helens eruption. The May 18, 1980, eruption of Mount St. Helens volcano in Washington State produced a crater at the mountain approximately one kilometer wide and two kilometers long. According to U.S. Geological Survey scientists, the atom bomb-like force of the main eruption also exploded out about 5,000 feet of the north face of the mountain and leveled trees in a 185 square mile area. The volcano last erupted 123 years ago. PIO No. 80-179.
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View northwest across the new Castle Creek Lake, northwest of Mount St. Helens. Skamania County, Washington. June 11, 1980.
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Mount St. Helens summit graben and bulge from northeast. Skamania County, Washington. March 30, 1980.
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Oblique aerial view of Mount St. Helens before the May 18, 1980, eruption, as seen from Bear Cove, Spirit Lake. Lake visible in foreground. Skamania County, Washington. August 1973.
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Ashfall area of May 18 eruption of Mount St. Helens on road to Trout Lake, approximately 30 miles northeast of Mount St. Helens. Ash deposited on Douglas fir trees. Lewis County, Washington. July 16, 1980.
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USGS Water Resources Division scientists taking sediment samples in the Cowlitz River at Castle Rock. Cowlitz County, Washington. February 20, 1982. Published in U.S. Geological Survey. Earthquake information bulletin, v. 16, no.2. March-April 1984, pp. 114-115.
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Large boulder carried in lahar flow, Muddy River. Geologists for scale. Skamania County, Washington. September 16, 1980.
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View to north of Spirit Lake from within amphitheater after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 23, 1980.
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View to east of Coldwater II Ridge from Coldwater I after May 18 eruption of Mount St. Helens. Cowlitz and Skamania Counties, Washington. May 23, 1980.
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Ashfall area of May 18 eruption of Mount St. Helens on Columbia River at Vantage, Washington, showing bridge where Interstate 90 crosses Columbia River and ash cloud being blown from the west bank to the east bank of the river. Kittitas and Grant Counties, Washington. July 17, 1980.
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Spirit Lake, north of Mount St. Helens, taken from debris island looking east. Fallen logs in foreground and devastated slopes in background. Skamania County, Washington. September 11, 1980.
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USGS scientist measuring mudflow line at Muddy River, near bridge. Compare height of mudlines with height of scientist at right. Skamania County, Washington. October 12, 1980. Published in lower photo, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984, p.109.
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Aerial view of Mount St. Helens debris flow in the Toutle River Basin. Erosion from snowmelt and several small brightly colored (turquoise, yellow, brown) pools of water. Cowlitz County, Washington. May 1, 1981.
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Upper Coldwater Creek more than 15 km north of Mount St. Helens summit. Skamania County, Washington. May 24, 1980.
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North points on top of Mount St. Helens bulge from southeast. Skamania County, Washington. May 16, 1980.
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Mount St. Helens crater deformation. USGS scientists measuring small thrust fault. Skamania County, Washington. May 12, 1981.


map background search result map search result map USGS 1:24000-scale Quadrangle for Mount St. Helens, WA 1983 Huge crater left by Mount St. Helens eruptions. Skamania County, Washington. 1980. USGS 1:24000-scale Quadrangle for Mount St. Helens, WA 1983 Huge crater left by Mount St. Helens eruptions. Skamania County, Washington. 1980.