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Official, Figure in hazard assessment
Map of pre-1980 Mount St. Helens volcano and adjacent area.
Figure 19 in: Crandell, D.R. (1989). Gigantic debris avalanche of Pleistocene age from ancestral Mount Shasta Volcano, California, and debris-avalanche hazard zonation. U.S. Geological Survey, Bulletin 1861, 32 p. https://doi.org/10.3133/b1861
Official, Figure in hazard assessment
Map of Washington and Oregon showing the percentage probability of accumulation of ten or more centimeters (four or more inches) of tephra from a large eruptions of Mount St. Helens.
Figure 2 in: Wolfe, E.W. & Pierson, T.C. (1995). Volcanic-Hazard Zonation for Mount St. Helens, Washington, 1995. U.S. Geological Survey, Open-File Report 95-497, 12 p., 1 plate. https://doi.org/10.3133/ofr95497
Official, Figure in hazard assessment
Map showing annual probability of 1 centimeter or more of tephra accumulation from any major Cascade volcano
Figure 15 in: Clynne, M. A., Robinson, J. E., Nathenson, M. & Muffler, L. P. (2012). Volcano hazards assessment for the Lassen region, northern California. U.S. Geological Survey, Scientific Investigations Report 2012-5176-A, 47 p., 1 plate. https://doi.org/10.3133/sir20125176A
Official, Figure in hazard assessment
Map showing annual probability of 1 cm or more of tephra accumulation in Washington, Oregon, and northern California from eruptions throughout the Cascade Range.
Figure 4 in: Sherrod, D.R., Mastin, L.G., Scott, W.E. & Schilling, S.P. (1997). Volcano hazards at Newberry Volcano, Oregon. U.S. Geological Survey, Open-File Report 97-513, 14 p. https://doi.org/10.3133/ofr97513
Official, Figure on website
Map showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range.
Nathensen, M. (2013). Map showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range. U.S. Geological Survey. Mount Bachelor Hazards. https://www.usgs.gov/volcanoes/mount-bachelor/hazards
Official, Map sheet or poster
Preliminary Overview Map of Volcanic Hazards in the 48 Coterminous United States
Mullineaux, D.R. (1978). Preliminary overview map of volcanic hazards in the 48 conterminous United States. U.S. Geological Survey, Miscellaneous Field Studies Map 786. https://doi.org/10.3133/mf786
Official, Figure in hazard assessment
Preliminary probabilistic tephra-hazard map for Pacific Northwest
Figure 2 in: Hoblitt, R.P., & Scott, W.E. (2011). Estimate of tephra accumulation probabilities for the U.S. Department of Energy's Hanford Site, Washington. U.S. Geological Survey, Open-File Report 2011-1064, 15 p. https://doi.org/10.3133/ofr20111064
Official, Figure on website
Simplified volcano hazards map of Mount St. Helens, Washington
Wolfe, E.W., Pierson, T.C., Driedger, C.L., Scott, W.E., Iverson, R.M., Ramsey, D.W., & Faust, L.M. (2014). Simplified volcano hazards map of Mount St. Helens, Washington. U.S. Geological Survey. Mount St. Helens, Washington Simplified Hazards Map. https://www.usgs.gov/media/images/mount-st-helens-washington-simplified-hazards-map (Modified from: U.S. Geological Survey, Open-File Report 95-497)
Official, Figure in hazard assessment
Tephra hazard zones
Figure 8 in: Crandell, D.R. & Mullineaux, D.R. (1978). Potential Hazards from Future Eruptions of Mount St. Helens Volcano, Washington. U.S. Geological Survey, Bulletin 1383-C, 26 p. https://doi.org/10.3133/b1383C
Official, Map sheet or poster
Tribal Lands and Volcano Hazards in the Pacific Northwest
Gardner, C.A. and Bard, J.A. (2021). How would a volcanic eruption affect your Tribe? U.S. Geological Survey General Information Product 209, https://doi.org/10.3133/gip209.