Mount Unzen

About

Mount Unzen (Unzen-dake) is an active stratovolcano of several overlapping small, volcanic cones, near the city of Shimabara, Nagasaki on the island of Kyushu, Japan's southernmost main island. In 1792, the collapse of one of its several lava domes triggered a megatsunami that killed 14,524 people in Japan's worst volcanic-related disaster. The volcano was most recently active from 1990 to 1995, and a large eruption in 1991 generated a pyroclastic flow that killed 43 people, including three volcanologists. Its highest peaks are Fugen-dake at 1,359 metres (4, 459 ft) and Heisei-shinzan at 1,486 metres (4, 875 ft). The latter emerged during the eruptions of the early, eponymous Heisei era (1989–2019).

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