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Potential Hazards from future volcanic eruptions in California

California (regional), United States, 1989

Plate 1 in: Miller, C.D. (1989). Potential hazards from future volcanic eruptions in California. U.S. Geological Survey, Bulletin 1847, 17 p., 2 tables, 1 plate, scale 1:500,000.



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.

Map Data

Map ID582
Hazard Process(es)Ash-cloud surges; Ballistics; Floods or jokulhaups; Flowage hazards; Lahars; Lateral or directed blasts; Lava dome-related hazards; Lava flows; PDCs; Surges; Tephra fall; Vent-opening hazards
Hazard Zone PresentationGrouped by process (e.g. flowage/fall hazards) on a series of small map panels of similar sizes
Temporal ScaleBackground, or long-term, map
Spatial ScaleRegional
Publication FormatPoster-style map insert in hazard assessment
Zonation Method(s)Geologic history
Zonation Model(s)
Scenario(s) ConsideredAnalog volcano(es); Composition; Size, VEI, or intensity; Source location or direction; Specific past eruption; Worst-case
Hazard Zone Label(s)Estimated value or Hazard Impact Metric; Hazard process name
Probability Definition(s)Scenarios imply probability
PurposeMultiple: intended for multiple purposes including general hazard awareness, planning, and crisis management
AudienceMultiple audiences (usually the public, civil authorities, and land-use planners)
Language(s)English
Basemap(s)Street map
Basemap overlay(s)
DiemsionalityPlanimetric (2D or map) view
Color SchemeCategorical/Qualitative
Volcanic Alert Level System