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Mount Kusatsu-Shirane (草津白根山, Kusatsu Shirane-san) is a 2,165 m (7,103 ft) active stratovolcano in Kusatsu, Gunma, Japan.[2] It is called Kusatsu Shirane to differentiate it from the Mount Nikkō-Shirane on the other side of Gunma Prefecture. The summit of Kusatsu-Shirane volcano, located immediately north of Asama volcano, consists of a series of overlapping pyroclastic cones and three crater lakes. The largest of these is Yu-gama, an acidic emerald green lake with rafts of yellow sulfur sometimes seen floating on its surface.[3][4]
| Mount Kusatsu-Shirane | |
|---|---|
 View of Mount Kusatsu-Shirane from the southeast | |
| Highest point | |
| Elevation | 2,165 m (7,103 ft) |
| Coordinates | 36.6438°N 138.5279°E |
| Naming | |
| Native name | 草津白根山 (Japanese) |
| Geography | |
| Geology | |
| Mountain type | Stratovolcano |
| Last eruption | January 23, 2018[1] |
On January 23, 2018, a minor phreatic eruption of the volcano occurred.[5] One person was killed, and others were injured in an avalanche triggered by the eruption.[6] The next day, new activity forced police to suspend search operations.[7] One month after the eruption, it was announced by prefectural officials that only the summit of the volcano was off limits to the public.[8]
Relief map of Kusatsu-Shirane Volcano
Yugama crater
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