Global Volcanism Program | Image GVP-05348
The primary Aniakchak 1931 eruption site is against the NW caldera wall. This 600-m-wide crater produced intermittent explosions of pumice-lithic tephra over the course of several weeks in May and June 1931. During the final phases of the eruption a small lava flow formed in the bottom of the crater. The fissure eruption cut through Vent Mountain and across the caldera floor to the western caldera wall.
Photo by Game McGimsey, 1992 (Alaska Volcano Observatory, U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.
Keywords: crater | caldera | vent