Lake Ashi, seen here from the SE, occupies the SW corner of Hakone caldera. Hakoneyama contains two calderas, the largest of which is 10 x 11 km. The arcuate caldera rim is to the left and the flanks of a group of post-caldera cones form the right-hand shoreline. Post-caldera eruptions have constructed a half dozen lava domes along a SW-NE trend across the center of the calderas. An eruption took place around 3,000 years ago and seismic swarms occurred frequently during the 20th century.

Photo by Lee Siebert, 1963 (Smithsonian Institution).

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

Keywords: caldera

Hakoneyama