USGS/Cascades Volcano Observatory, Vancouver, Washington
Mount St. Helens, Washington -
Ash and Tephra
- Background and Information
- Maps, Graphics, and Images
- Items of Interest
-
Areal distribution, thickness, and mass of ash from the five major
eruptions after May 18
-- Excerpt from: Sarna-Wojcicki, et.al., 1981, IN: USGS Professional Paper 1250
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Areal Distribution, Thickness, Mass, Volume, and Grain Size of
Air-Fall Ash from the Six Major Eruptions of 1980
-- Sarna-Wojcicki, et.al., 1981, IN: USGS Professional Paper 1250
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Ash and Tephra - Description
-- general information about ash and tephra, including terminology and hazards
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Ash and Tephra - Menu
-- general information about ash and tephra, including terminology and hazards
-
Ashfall: Mount St. Helens, May 18, 1980
-- Excerpt from: Tilling, et.al., 1990
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Distribution within the United States of
May 18, 1980 ash fallout from Mount St. Helens - Map
-- [Map,20K,InlineGIF]
-- Modified from: Tilling, Topinka, and Swanson, 1990
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Mass, volume, bulk density, and area covered by the 0.1-g/cm2
isomass contour for downwind ash erupted from Mount St. Helens, March
27 through October 16
-- Excerpt from: Sarna-Wojcicki, et.al., 1981, IN: USGS Professional Paper 1250
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May 18, 1980 Ash Plume Path - Map
-- [Map,22K,InlineGIF]
-- Modified from: Sarna-Wojcicki, et.al., 1981, IN:
USGS Professional Paper 1250
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"Pictogram" - Volcanic Ash
-- [278K,InlineGIF]
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Schematic Diagram of West-East Geologic Section of gully bank near NE base of
Mount St. Helens, south of Windy Ridge - Graphic
-- [Schematic,25K,GIF]
-- Modified from: Doukas, 1990, USGS Bulletin 1859
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Vertical growth and downwind progress of the ash plume from the May 18
eruption
-- Excerpt from: Sarna-Wojcicki, et.al., 1981, IN: USGS Professional Paper 1250
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Volcanic Ash - "Pictogram"
-- [278K,InlineGIF]
- Publications and Reports
URL for CVO HomePage is:
<http://vulcan.wr.usgs.gov/home.html>
URL for this page is:
<http://vulcan.wr.usgs.gov/Volcanoes/MSH/Tephra/framework.html>
If you have questions or comments please contact:
<GS-CVO-WEB@usgs.gov>
04/16/02, Lyn Topinka