America’s most dangerous volcanoes

Mauna Loa Volcano, HI - Mauna Loa is the Earth’s largest active volcano. Before 2022's event, Mauna Loa last erupted in 1984.

Kilauea Volcano, HI - Kilauea has been active since 1983. It has erupted several times in the last few years.

Mount Rainier Volcano, WA - The highest peak in the Cascade Range last erupted about 1,000 years ago.

Mount St. Helens, WA - This volcano most recently erupted from 2004-2008.

Mount Hood Volcano, OR - Oregon’s highest peak last erupted in 1865.

South Sister Volcano, OR - The entire Three Sisters area is considered to have a high threat potential for eruptions.

Lassen Volcanic Cluster, CA - This volcanic area last experienced an eruption in 1917.

Mount Shasta Volcano, CA - This volcano last erupted 200-300 years ago.

Redoubt Volcano, AK - This volcano last erupted in 2009, and is close to the city of Anchorage.

Crater Lake Volcano, OR - The Mount Mazama volcano last erupted 6,600 years ago.

Yellowstone Caldera, WY - The volcanic eruptions that formed Yellowstone’s calderas haven’t occurred for 70,000 years.

Long Valley Caldera, CA - The volcano hasn’t erupted for at least 16,000 years, but has shown signs of unrest over the past few decades.

Newberry Volcano, OR - The largest volcano in the Cascades volcanic arc has not erupted for 1,300 years.

Mount Akutan, AK - This Alaskan volcano was last active in 2014, and is being monitored.

Mount Cleveland, AK - The volcano is one of the more active volcanoes in the Aleutian Arc.