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Caption: Mount St. Helens sends ash plume two miles high. March 28, 1980 aerial view of Mount St. Helens showing ash and steam eruption that sent volcanic material almost two miles above the mountain's 9,677-foot peak. When the main eruption violently occurred seven weeks later on May 18, 1980, an estimated minimum of 1 cubic kilometer (1.3 billion cubic yards) of ash and rock was ejected by the volcano, according to USGS scientists. In comparison, Mt. Vesuvius spewed slightly more than 1 cubic kilometer in its eruption in 79 A.D. that buried Pompeii. The eruption of Indonesia's Krakataua in 1883 produced over 20 cubic kilometers. The force of the volcanic blast on that Sunday morning in May 1980, was estimated...
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Mount St. Helens Collection,
Skamania County, Washington,
USGS PIO Collection,
Volcanoes,
aerial,
Index card: Oblique aerial view of Mount St. Helens in eruption from west, showing upper part of volcano and eruptive plume. 1516 hrs. Skamania County, Washington. May 18, 1980. (Part of plane visible at left).
Caption accompanying photograph: Photo shows the May 18, 1980 eruption, the largest to date, with the upper third of the mountain centered in the photo. Mount Adams in background. Skamania County, Washington. No index card.
Caption accompanying photograph: Photo shows a closer view of the crater and eruption of May 18, 1980. Mount St. Helens, Skamania County, Washington. No index card.
Index card: More distant aerial view, looking south, of crater and dome partially obscured by plumes from fumaroles. Skamania County, Washington. July 13, 1980. (Photo by M. Doukas). (Tip of plane wing visible at left edge of photo).
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Doukas, M.P. Collection,
Leighley, T. Collection,
Mount St. Helens Collection,
Photographers,
Skamania County, Washington,
Slide description and index card (69ct, 79ct): Mount St Helens in eruption. Oblique aerial view of Mount St. Helens from the northwest: first view of new crater/north side. Photos are within seconds of each other. 20:09 hrs. Skamania County, Washington. May 18, 1980. (Portion of plane wing visible at left).
Index card: Mount St. Helens in eruption: aerial view from the southwest of the volcano looking north. More of the rim and eruptive plume are visible than in photo no. 6ct (msh_crl00006_ct). 1730 hrs PDT. Skamania County, Washington. May 18, 1980. (Part of plane visible in lower right and in upper right corner).
Index card: Mount St. Helens in eruption: aerial view to the east showing upper part of volcano, eruptive column reduced in height; ash cloud spreading to left. 1803 hrs PDT. Skamania County, Washington. May 18, 1980. (Tip of plane wing just visible at left edge).
Index card: Mount St. Helens in eruption: aerial view looking north showing south side of volcano, eruptive plume dirfting north and east, ash cloud and plumes from phreatic evens over pumice plain. 1923 hrs PDT. Skamania County, Washington. May 18, 1980. (End of plane wing visible at bottom).
Slide description: Oblique aerial view down into Mount St. Helens crater showing debris at bottom. Skamania County, Washington. April 2, 1980. No index card available.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Hoblitt, R.P. Collection,
MSH-Hoblitt, R.P. Collection,
Mount St. Helens Collection,
Photographers,
Skamania County, Washington,
Slide description: Oblique aerial view looking southeast, phreatic eruption plume continuing to build. 1445 hrs. Skamania County, Washington. April 10, 1980. No index card available.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Hoblitt, R.P. Collection,
MSH-Hoblitt, R.P. Collection,
Mount St. Helens Collection,
Photographers,
Skamania County, Washington,
Slide description: Aerial view into Mount St. Helens summit craters; septum between two craters still exists. Skamania County, Washington. April 2, 1980. No index card available.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Hoblitt, R.P. Collection,
MSH-Hoblitt, R.P. Collection,
Mount St. Helens Collection,
Photographers,
Skamania County, Washington,
Aerial view of typical terrain of 180-foot loessial silt-mantled gravel terrace, with its thaw lakes, incised creeks. Located between Beaver Creek and Rogers Creek south of Yukon River. Yukon Flats district, Yukon region, Alaska. August 7, 1949.
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).
Slide description and index card: Aerial photographs of the lava dome that extruded into the crater of Mount St. Helens during the latter part of June 1980.The volcano's dacite lava has a pasty consistency when it is molten, and it tends to pile up rather than to flow laterally. This dome, which was largely destroyed in a subsequent eruption on July 22, 1980, was, at this stage, about 1,200 feet across and 200 feet high. Its rough, shattered appearance resulted mainly from the expansion and shattering of the solidified outer crust as more molten lava was forced upward by the great pressure in the magma chamber underlying the volcano. B, View from the west over the crater rim from a helicopter taking geologists to...
Album caption, slide description, and slide index card: MSH-Branch of Exhibits no. 8cp: Mount St. Helens. Aerial view. Minor steam eruption from summit crater, from northeast, 10:15 a.m. Skamania County, Washington. May 31, 1980. (Photo by T. Casadevall) (Same as MSH-BE-VOLC-0022ct)
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).
Album caption, slide description, and slide index card: MSH-Branch of Exhibits no. 19cp: Mount St. Helens. Aerial view of barren slope devastated by May 18 eruption. Skamania County, Washington. June 1980. (Photo by J. DeVine) (Same as MSH-BE-VOLC-0033ct) (msh_boe_volc0033_ct).
Album caption and index card: Oblique aerial view of the confluence of Columbia and Cowlitz Rivers showing suspended sediment and debris in the Cowlitz River caused by the eruption of Mount St. Helens on May 18, 1980. City of Longview in background. Cowlitz County, Washington. May 23, 1980. Published as figure 12 in U.S. Geological Survey. Circular 850-K. 1983.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Cowlitz County, Washington,
MSH-Haeni, F.P. Collection,
Mount St. Helens Collection,
Photographers,
Volcanoes,
Index card: Near view of top of dome, showing cracks. Skamania County, Washington. January 2, 1981. (Aerial view).
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Leighley, T. Collection,
Mount St. Helens Collection,
Photographers,
Skamania County, Washington,
Volcanoes,
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