"There are about 169 volcanoes in the United States that scientists consider active. Most of these are located in Alaska, where eruptions occur virtually every year. Others are located throughout the west and in Hawaii (see our Volcano Activity Map for their locations). Kilauea volcano in Hawaii is one of the most active volcanoes on Earth. read more
There are 65 volcanoes in the United States and its territories that scientists consider active, including Mount St. Helens. Of those volcanoes, 12 are on alert, which means they are on heightened watch for eruptive activity, and two are erupting right now or expected to erupt shortly. read more