This map illustrates volcanic hazards to the energy infrastructure within the U.S. It identifies which U.S. Dept. of Energy sites & commercial energy utilities are vulnerable to these hazards. This map is based on existing data for volcanic activity & volcanic history & on the critical elements of the western U.S.

energy infrastructure (commercial generating facilities & major power transmission lines). The map & the accompanying text serve as a tutorial for engineers & planners who are responsible for mitigation of hazards from future eruptions.