Contour map of the estimated annual probability of the accumulation of 10 cm or more of tephra in the northwestern United States at eruptions at 13 major volcanic centers in the Cascades Range
Cascades Range (regional, USA only), United States, 1987
Plate 3 in: Hoblitt, R. P., Miller, C. D., & Scott, W. E. (1987). Volcanic hazards with regard to siting nuclear-power plants in the Pacific Northwest. U.S. Geological Survey, Open-File Report 87-297. https://doi.org/10.3133/ofr87297
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.
Click on image for full-size map. If link seems broken, try the archived version.
Hoblitt, R. P., Miller, C. D., & Scott, W. E. (1987). Volcanic hazards with regard to siting nuclear-power plants in the Pacific Northwest. U.S. Geological Survey, Open-File Report 87-297. https://doi.org/10.3133/ofr87297Map Set
https://doi.org/10.3133/ofr87297
Other Maps In Set:
Map Data
Map ID 3380 Hazard Process(es) Tephra fall Hazard Zone Presentation Single hazard: A single hazard process is represented on a main map panel Temporal Scale Background, or long-term, map Spatial Scale Regional Publication Format Poster-style map insert in hazard assessment Zonation Method(s) Geologic history Zonation Model(s) Scenario(s) Considered Season or weather; Source location or direction Hazard Zone Label(s) Numeric probability Probability Definition(s) Annual numeric probability Purpose Land-use planning: Intended to inform citing of facilities, building restrictions, resource management, and infrastructure development Audience Land-use planners, city planners, government officials, etc. Language(s) English Basemap(s) Street map Basemap overlay(s) Diemsionality Planimetric (2D or map) view Color Scheme Symbols and/or lines only