Global Volcanism Program | Image GVP-05354
Strombolian eruptions from a scoria cone (upper left) produce heavy ashfall that darkens the entire Veniaminof caldera floor in this 26 July 1983, view from the SW. A plume rises above a vent near the top of the cone that is producing a lava flow down the flank and melting a large pit in the glacier-covered caldera floor. Two meltwater lakes have formed in the depressions and steam rises from the margins of the lava flow. Concentric fractures are visible around the margin of the pit due to exposed glacial ice from the collapse.
Photo by Betsy Yount, 1983 (Alaska Volcano Observatory, U.S. Geological Survey).