Alaska Volcano Observatory

Novarupta Dome, an almost perfectly circular mass of rhyolite lava, was emplaced at the Novarupta vent site in the weeks to months following the explosive eruption of June 6-9, 1912. The dome is roughly 500 m across and sits in the nearly 2-km-wide vent crater. The rubbly texture is characteristic of silicic lava domes.

Credit: Image courtesy of AVO / U.S. Geological Survey.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory/U.S. Geological Survey when using this image.
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