Alaska Volcano Observatory - Augustine Volcano

Augustine Volcano is a complex stratovolcano consisting of a central cluster of lava domes and flows, surrounded by pyroclastic debris in Cook Inlet.

Alaska Volcano Observatory - Mount Spurr

Mount Spurr is a stratovolcano in the Aleutian Arc of Alaska, located in the Cook Inlet region.

Capulin Volcano National Monument (U.S. National Park Service)

Capulin Volcano National Monument

Hawaiian Volcano Observatory - Kilauea

Kīlauea is an active shield volcano in the Hawaiian Islands, and the most active of the five volcanoes that together form the island of Hawaiʻi.

Hawaiian Volcano Observatory - Mauna Loa

Mauna Loa is one of five volcanoes that form the Island of Hawaii in the U.S. state of Hawaiʻi in the Pacific Ocean.

Mount Baker Volcano Research Center

Centro de investigación dedicado al monitoreo y geología del volcán Mount Baker.

Mount Rainier Volcano Observatory

Mount Rainier is a large active stratovolcano in the Cascade Volcanic Arc, located in Pierce County, Washington.

Mount St. Helens Volcano Observatory

Mount St. Helens is a active stratovolcano located in Skamania County, Washington, in the Pacific Northwest region of the United States.

The Volcanoes of the Cascades

A descriptive essay of the Cascade volcanoes and their eruptive history. Includes recent Mt St. Helens eruption, formation of Crater Lake.

Volcanoes of the United States

Comprehensive online publication by the USGS examining how volcanic forces have shaped the American landscape. Also addresses more recent activity in the Hawaiian, Cascade, and Alaskan ranges.

Yellowstone Volcano Observatory

Yellowstone Caldera is a volcanic caldera and supervolcano in Yellowstone National Park in the Western United States.