Usu volcano is a located on the southern topographic rim of the 110,000-year-old Toya caldera. The summit, seen here above the town of Toyako-Onsen to the NW, consists of dacitic lava domes and a cryptodome that were emplaced in a small summit caldera during historical eruptions.

Photo by Dick Stoiber, 1981 (Dartmouth College).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Galleries: Lava Domes

Keywords: lava dome

Toya