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Haruna Volcano, Japan
Haruna volcano is truncated by a small summit caldera containing the symmetrical post-caldera cone of Haruna-Fuji (right).
Viscous lava flows and lava domes were extruded within and around the caldera.
Its western side is currently filled by Lake Haruna, which is visible to the left of Haruna-Fuji.
The Futatsu-dake lava dome, outside the caldera to the east, was the source of two large explosive eruptions during the 6th century AD.
This view from the NE also shows steaming Asama volcano on the distant horizon above Lake Haruna.
Haruna volcano is truncated by a small summit caldera containing the symmetrical post-caldera pyroclastic cone of Haruna-Fuji.
Haruna-san volcano dates back prior to 300,000 years ago and had caldera-producing eruptions at about 200,000 and 40,000 years ago.
Viscous lava flows and lava domes were subsequently extruded within and around the caldera, the western side of which is currently partially filled by Lake Haruna.
The Futatsu-dake lava dome east of the caldera was the source of two large explosive eruptions during the 6th century AD.
PHOTO SOURCE: Ichio Moriya (Kanazawa University), courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.
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