Global Volcanism Program | Image GVP-02207
Yotei volcano is seen here to the NW above Lake Toya, which fills the 10-km-wide Toya caldera. The caldera formed during a major eruption about 110,000 years ago. A series of lava domes in the center of the lake form Nakanojima island, whose flank is in the right foreground. The photo was taken from the lower flank of Usu volcano, which formed on the southern rim of Toya caldera.
Photo by Norm Banks, 1981 (U.S. Geological Survey).
This image is made available as a Public Domain Work, but proper attribution is appreciated.