Global Volcanism Program | Image GVP-05315
A lava dome 65 m high and 380 m wide lies within a circular ejecta ring and caps the 1912 vent of Novarupta volcano. A 60-hour-long eruption beginning on 6 June 1912, the Earth's largest eruption during the 20th century, produced The Valley of Ten Thousand Smokes pyroclastic flow deposit, which forms the flat ground to the right. The face of Falling Mountain, behind Novarupta dome, was sheared off by a 2-km-wide collapse around the Novarupta vent. This view from the NE shows snow-capped Mageik in the background.
Photo by Tom Miller (Alaska Volcano Observatory, U.S. Geological Survey).