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Tolbachik Volcano, Russia
Powerful jets of incandescent lava rise above the crater of a cinder cone along Kamchatka's Tolbachik south-flank rift zone in late-July 1975.
This cinder cone, the first of three large cones formed along the northern part of the rift zone during the early stage of the eruption, began to grow on July 6.
At times, powerful lava fountains rose 1-2.5 km above the vent and ash columns reached 10-18 km heights.
After July 27, eruptions from the first cone became dominantly effusive.
Activity at the first cone ceased on August 9.
PHOTO SOURCE: Yuri Doubik 1975, Institute of Volcanology, Petropavlovsk, courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.
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