Griggs volcano overlooks Valley of Ten Thousand Smokes filled by ash in 1912 eruption of Katmai, Katmai Volcano National Park, Alaska, USA, North America

Valley of Ten Thousand Smokes with ignimbrite of 1912 eruption, Griggs volcano behind, Katmai National Park, Alaska, USA, North America

Arching Lava Fountain

Mt. Griggs rises over the ash- and pumice-covered Valley of Ten Thousand Smokes in Katmai National Park. The ash-covered Knife Creek Glaciers can be seen coming out of the valley at right; Alaska, United States of America

Mt. Griggs rises above the ash- and pumice-covered Valley of Ten Thousand Smokes in Katmai National Park; Alaska, United States of America