Ash from the 1912 Novarupta eruption periodically hits the west side of Kodiak Island, Larsen Bay and Karluk, roughly 65 ...

Scientists have found previously undocumented ash deposits buried beneath the Lava Creek Tuff in Wyoming — and at least one ...

When Mount Spurr erupted in 1992, ash spewed some 50,000 feet into the air and blanketed much of the Matanuska-Susitna Valley ...

Scientists are bracing for high lava fountains in the latest episode of an ongoing eruption of Hawaii’s Kilauea volcano.