is a complex volcano
in Kanagawa Prefecture
that is truncated by two overlapping caldera
s, the largest of which is 10 × 11 km wide. The calderas were formed as a result of two major explosive eruptions about 180,000 and 49,000–60,000 years ago. Lake Ashi
lies between the southwestern caldera wall and a half dozen post-caldera lava dome
s that arose along a southwest–northeastern trend cutting through the center of the calderas. Dome growth occurred progressively to the south, and the largest and youngest of them, Kami-yama
, forms the high point of Hakone. The calderas are breached to the east by the Haya-kawa
canyon. Mount Ashigara
is a parasitic cone.
The latest magmatic eruptive activity at Hakone occurred 2,900 years ago. It produced a pyroclastic flow
and a lava dome
in the explosion crater, although phreatic eruption
s took place as recently as the 12–13th centuries AD.
According to the nearby Hakone Shrine
, the Komagatake peak has been the object of religious veneration since ancient times.
File:Hakone Volcano 20121110.jpg|Central cones of Hakone volcano
File:Lake Ashi from Mt.Komagatake 02.jpg|Lake Ashi viewed from central cone Mt.Komagatake lava dome.
- Japan Meteorological Agency
* - Japan Meteorological Agency
- Geological Survey of Japan
Hakoneyama: Global Volcanism Program
- Smithsonian Institution
Category:Volcanoes of Kanagawa Prefecture
Category:Izu-Bonin volcanic arc
Category:Calderas of Japan