Old Faithful banner

Lobby > Exhibits > Hot Water Treasures > Global Context > United States > Umnak Island

In the U.S.

UMNAK ISLAND, ALASKA

Umnak Island, the third largest Aleutian Island, is home to a large volcanic caldera on Mt. Okmok. Since the destruction of Beowawe and Steamboat Hot Springs, Umnak is the second largest geyser field in the United States, after Yellowstone. The Umnak field contains at least 12 geysers scattered within several groups of hot spring.

A fumarole steams amind snowdrifts on Umnak Island.
Credit: C. Nye, U.S. Geological Survey Department of the Interior,
Alaska Division of Geological and Geophysical Surveys

Next | 1 > 2 > 3 Next Area: Iceland

Drawing of the outside of the visitor center
Explorations
Exhibits
Maps
Multimedia
Young Scientists
Bookstore
Resources
Yellowstone Express
Webcams
Why Geysers Erupt
Hot Water Treasures
Hot Spring Ecology
Scientific Research

This work is supported by

National Science Foundation    Yellowstone Park Foundation

Last Updated: 00/00/00; Make an email comment or suggestion