Billy Mitchell (volcano)

Billy Mitchell volcano
The dark-colored caldera lake of Billy Mitchell is at right, above an ash plume originating from Bagana.
Highest point
Elevation
Coordinates
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
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 northeast 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.

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).

See also

• List of volcanoes in Papua New Guinea
• Mount Billy Mitchell (Chugach Mountains)
• Timetable of major worldwide volcanic eruptions

External links

• Photo of the Billy Mitchell Crater Lake