Levels of Volcanic Risk Near Mount St. Helens
St. Helens, United States, 1984
Figure 1 in: Newhall, C.G. (1984). Semi-quantitative assessment of changing volcanic risk at Mount St. Helens, Washington. U.S. Geological Survey, Open-File Report 84-272, 30 p. doi:10.3133/ofr84272
This map was produced by an official agency, but is NOT the most recent, most complete, or main operational map.
For the current operational hazard map, please consult the proper institutional authorities.
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Map Data
Map ID 618 Hazard Process(es) Unstated or all hazards Hazard Zone Presentation Hazard level-focused: All or most hazards are combined by hazard level on a main map panel Temporal Scale Very short-term crisis map (hours to days)
Spatial Scale Volcano and surrounding area Publication Format Figure in a hazard assessment or mitigation plan Zonation Method(s) Event tree Zonation Model(s) Scenario(s) Considered Current conditions; Specific past eruption Hazard Zone Label(s) Numeric probability Probability Definition(s) Annual numeric probability Purpose Scientific interest: Intended for scientific research and general scientific interest; usually published in academic journals Audience Scientists (usually in scientific publication) Language(s) English Basemap(s) Contour lines Basemap overlay(s) Diemsionality Planimetric (2D or map) view Color Scheme Symbols and/or lines only