Bagana

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Mt Bagana
MtBalbiToreNASA.jpg
An ash plume originating from Bagana at right, just below the dark-colored caldera lake of Billy Mitchell
Highest point
Elevation 1,750 m (5,740 ft)
Coordinates 6°08′24″S 155°11′42″E / 6.140°S 155.195°E / -6.140; 155.195
Geography
Location Bougainville, Papua New Guinea
Parent range Emperor Range
Geology
Mountain type Lava cone
Last eruption 2000 to 2015 (ongoing)[1]

Mt Bagana is an active volcano located in the centre of the island of Bougainville, Papua New Guinea, the largest island of the Solomon group. It is the most active volcano in the country, occupying a remote portion of central Bougainville Island. One of Melanesia's youngest and most active volcanoes.

Bagana is a massive symmetrical, roughly 1750-m-high lava cone largely constructed by an accumulation of viscous andesitic lava flows. The entire lava cone could have been constructed in about 300 years at its present rate of lava production. Eruptive activity at Bagana is frequent and is characterized by non-explosive effusion of viscous lava that maintains a small lava dome in the summit crater, although explosive activity occasionally producing pyroclastic flows also occurs. Lava flows form dramatic, freshly preserved tongue-shaped lobes up to 50-m-thick with prominent levees that descend the volcano's flanks on all sides.[2]

Just north-east of Bagana is the volcano crater lake Billy Mitchell. Bagana is one of 17 post-Miocene strato volcanos on Bougainville.[3] U.S. General Floyd L. Parks flew over the Solomon Islands on 27 October 1948 and witnessed the eruption of Bagana. His photographs of Bagana erupting were published in Life magazine.[4]

See also[edit]

References[edit]

  1. ^ "Bagana". Global Volcanism Program. Smithsonian Institution. 
  2. ^ "Earthquake-Report.com". 
  3. ^ Blake, D.H., "Post miocene volcanoes on Bougainville Island, territory of Papua and New Guinea", Bulletin of Volcanology 1968, Vol. 32(1):121–138, retrieved 27 February 2010 
  4. ^ "Volcano erupts", Life Magazine, p. 42, 29 November 1948, retrieved 27 February 2010