Billy Mitchell (volcano)
| Billy Mitchell volcano | |
|---|---|
The dark-colored caldera lake of Billy Mitchell is at right, above an ash plume originating from Bagana.
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| Highest point | |
| Elevation | 1,544 m (5,066 ft) |
| Coordinates | 6°06′S 155°13′E / 6.100°S 155.217°ECoordinates: 6°06′S 155°13′E / 6.100°S 155.217°E |
| Geography | |
| Location | Bougainville, Papua New Guinea |
| Parent range | Emperor Range |
| Geology | |
| Mountain type | Pyroclastic shield |
| Volcanic arc/belt | Bougainville & Solomon Is. |
| Last eruption | 1580 ± 20 years |
| Billy Mitchell | |
|---|---|
| Location | Bougainville Island |
| Coordinates | 6°06′00″S 155°13′00″E / 6.1°S 155.21667°E |
| Type | crater lake |
| Basin countries | Papua New Guinea |
| Surface area | ~3 square kilometres (1.2 sq mi) |
| Max. depth | ~90 metres (300 ft) |
Billy Mitchell is a volcano in the central part of the island of Bougainville, just north-east of the Bagana Volcano in Papua New Guinea. It is a small pyroclastic shield truncated by a 2 km wide caldera filled by a crater lake. It is named after Billy Mitchell, a 20th-century United States Army general.
The last two major eruptions were in 1580 AD ± 20 years and about 1030 AD. They were among the largest Holocene eruptions in Papua New Guinea. Both were explosive eruptions with a Volcanic Explosivity Index of at least 5. The 1580 AD ± 20 years eruption produced pyroclastic flows and probably formed its caldera. The ignimbrite deposit from that eruption, which had a VEI of 6, extends 22 kilometres (14 mi) from the caldera to the coast, and its volume is around 10 cubic kilometres (2.4 cu mi).
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