Approximate extent of subaqueous debris-avalanche deposits northwest of Great Sitkin Island. Also shown are areas of Adak coastline that could be affected by tsunamis generated by a large flank collapse of Great Sitkin Volcano.

Great Sitkin, United States, 2003

Figure 12 in: Waythomas, C.F., Miller, T.P. & Nye, C.J. (2003). Preliminary volcano-hazard assessment for Great Sitkin Volcano, Alaska. U.S. Geological Survey, Open-File Report 03-112, 25 p., 1 plate. https://doi.org/10.3133/ofr03112

This map was produced by an official agency, but may not be 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 Set

Waythomas, C.F., Miller, T.P. & Nye, C.J. (2003). Preliminary volcano-hazard assessment for Great Sitkin Volcano, Alaska. U.S. Geological Survey, Open-File Report 03-112, 25 p., 1 plate. https://doi.org/10.3133/ofr03112
https://doi.org/10.3133/ofr03112

Map Data

Map ID	1323
Hazard Process(es)	Tsunami
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	Island
Publication Format	Figure in a hazard assessment or mitigation plan
Zonation Method(s)	Geologic history
Zonation Model(s)
Scenario(s) Considered	Style or type
Hazard Zone Label(s)	Hazard process name
Probability Definition(s)	Qualitative relative probability (e.g. high-medium-low)
Purpose	Multiple: intended for multiple purposes including general hazard awareness, planning, and crisis management
Audience	Multiple audiences (usually the public, civil authorities, and land-use planners)
Language(s)	English
Basemap(s)	Simple or sketch map
Basemap overlay(s)
Diemsionality	Planimetric (2D or map) view
Color Scheme	Single color
Volcanic Alert Level System

Go to Global Volcanism Program page for Great Sitkin →