Atosanupuri lava dome was emplaced about 1,000 years ago and its hydrothermally altered flanks are visible in this photo. The 900-m-wide dome was constructed within a 1-km-wide crater. Atosanupuri is one of a cluster of lava domes that occupy the eastern side of Kussharo Caldera.

Photo by Lee Siebert, 1977 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Keywords: lava dome | hydrothermal alteration

Kussharo