Mount Unzen

Mount Unzen
Mt. Unzen, showing extensive pyroclastic flow and lahar deposits
Highest point
Elevation	1,486 m (4,875 ft)
Coordinates	32°45′41″N 130°17′55″E / 32.76139°N 130.29861°E / 32.76139; 130.29861
Geography
Mount Unzen Unzen, Nagasaki, Kyushu, Japan Show map of Japan Mount Unzen Mount Unzen (Kyushu) Show map of Kyushu
Geology
Rock age	Oldest 500 kyr[1]
Mountain type	Complex stratovolcano
Last eruption	February to May 1996

Mount Unzen (雲仙岳, Unzen-dake) is an active volcanic group of several overlapping stratovolcanoes, 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 (普賢岳) at 1,359 metres (4,459 ft) and Heisei-shinzan (平成新山) at 1,486 metres (4,875 ft). The latter emerged during the eruptions of the early, eponymous Heisei era (1989–2019).