Unzen Volcano | John Seach


Kyushu, Japan

32.75 N, 130.30 E
summit elevation 1500 m
Complex volcano

The volcanic complex consists of three overlapping volcanoes. The highest peaks are Fugen-dake (1359m) and Heisei-Shinzan (1486m).

In 1991 Forty-four people, including French and American volcanologists, were killed by pyroclastic flows, and more than 2,000 buildings were destroyed by pyroclastic flows and lahars.

Bandai-type (Bandaian) eruptions is the name given to major slope failures caused by phreatic eruptions. Bezymianny-type eruptions (1956) include a magmatic component. Slope failure without eruption has occurred at Unzen volcano in 1792.

Further Reading
Nakada, S., Shimizu, H. and Ohta, K., 1999. Overview of the 19901995 eruption at Unzen Volcano. Journal of Volcanology and Geothermal Research, 89(1-4), pp.1-22.

Hoshizumi, H., Uto, K. and Watanabe, K., 1999. Geology and eruptive history of Unzen volcano, Shimabara peninsula, Kyushu, SW Japan. Journal of Volcanology and Geothermal Research, 89(1-4), pp.81-94.

Unzen Volcano Eruptions

1996, 1990-95, 1798?, 1792, 1690-92, 1663, 1663, 860?