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
Volcanic Alert Level System

Go to Global Volcanism Program page for St. Helens →