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Hijiori

Caldera · Japan · 552m

Hijiori volcano, seen from the E, is a small caldera located NE of the Pleistocene Gassan volcano. The town of Hijiori lies in the left foreground along the banks of two rivers through the caldera floor. The low 2.5-km-wide caldera formed during a large eruption between about 9,500 and 11,000 years ago, accompanied by pyroclastic flows and ashfall that extended to the E and reached the Pacific coast.
Hijiori volcano, seen from the E, is a small caldera located NE of the Pleistocene Gassan volcano. The town of Hijiori lies in the left foreground along the banks of two rivers through the caldera floor. The low 2.5-km-wide caldera formed during a large eruption between about 9,500 and 11,000 years ago, accompanied by pyroclastic flows and ashfall that extended to the E and reached the Pacific coast. · Photo: Copyrighted photo by Hiroshi Yagi (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).
Type
Caldera
Country
Japan
Region
Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Elevation
552m
Coordinates
38.599, 140.162
Last eruption
Unknown
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Caldera
Major rock type
Dacite
Geological summary

Hijiori caldera is a small, inconspicuous caldera located NE of the Pleistocene Gassan stratovolcano. The low 2.5-km-wide caldera formed during a large eruption about 10,300 radiocarbon years ago. This eruption was accompanied by dacitic pyroclastic flows and tephra fall that extended to the east and reached the Pacific coast and growth of a lava dome. Small local tephra deposits overlie lacustrine deposits. Hot springs occur at Hijiori, and caldera lake deposits have undergone extensive hydrothermal alteration.

Eruption history

Detailed timeline

No eruption records available.

External links

⚠ For reference only. Not for emergency response.