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Bagana

Cono di lava · Papua New Guinea · 1855 m

Plumes rise from a slow-moving andesite lava flow descending the NW flank of Bagana on 26 April 1988. The flow at that time had been moving for about 3 or 4 years and is typical of the lava extrusion that began in 1972. This volcano was largely constructed by an accumulation of viscous andesite lava flows like this one.
Plumes rise from a slow-moving andesite lava flow descending the NW flank of Bagana on 26 April 1988. The flow at that time had been moving for about 3 or 4 years and is typical of the lava extrusion that began in 1972. This volcano was largely constructed by an accumulation of viscous andesite lava flows like this one. · Foto: Photo by Wally Johnson, 1988 (Australia Bureau of Mineral Resources). · Wikimedia Commons
Tipo
Cono di lava
Paese
Papua New Guinea
Regione
Southwestern Pacific Volcanic Regions / Bougainville Volcanic Arc
Altitudine
1855 m
Coordinate
-6.137, 155.196
Ultima eruzione
2026
Contesto tettonico
Subduction zone / Crustal thickness unknown
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

Bagana volcano, in a remote portion of central Bougainville Island, is frequently active. This massive symmetrical cone was largely constructed by an accumulation of viscous andesitic lava flows. The entire edifice could have been constructed in about 300 years at its present rate of lava production. Eruptive activity is characterized by non-explosive effusion of viscous lava that maintains a small lava dome in the summit crater, although occasional explosive activity produces pyroclastic flows. Lava flows with tongue-shaped lobes up to 50 m thick and prominent levees descend the flanks on all sides.

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1842~1858 · 1 eruzioni · VEI max. 11858~1874 · 1 eruzioni · VEI max. 21874~1889 · 1 eruzioni · VEI max. 31889~1905 · 3 eruzioni · VEI max. 21905~1921 · 2 eruzioni · VEI max. 21937~1953 · 7 eruzioni · VEI max. 41953~1968 · 8 eruzioni · VEI max. 31968~1984 · 2 eruzioni · VEI max. 21984~2000 · 1 eruzioni · VEI max. 218421874192119531984

Cronologia dettagliata

  1. 2000VEI 2Osservata
    2000-02-28 – 2026-03-17
  2. 1972VEI 2Osservata
    1972-07-02 – 1995-07-02
  3. 1970VEI 2Osservata
    1970-05-21 – 1971-08-16
  4. 1968VEI 2Osservata
    1968-08-16 – 1968-08-16
  5. 1966VEI 3Osservata
    1966-03-20 – 1967-11-30
  6. 1964VEI 2Osservata
    1964-04-24 – 1965-07-02
  7. 1962VEI 2Osservata
    1962-02-15 – 1963-07-02
  8. 1961VEI 2Osservata
    1961-07-26 – In corso
  9. 1959VEI 2Osservata
    1959-07-02 – 1960-05-16
  10. 1956VEI 2Osservata
    1956-07-02 – In corso
  11. 1953VEI 3Osservata
    1953-06-16 – 1953-09-16
  12. 1952VEI 4Osservata
    1952-02-29 – 1952-10-16
  13. 1948VEI 3Osservata
    1948-12-01 – 1951-12-01
  14. 1945VEI 2Osservata
    1945 – 1947
  15. 1943VEI 1Osservata
    1943-04-07 – In corso
  16. 1939VEI 2Osservata
    1939-01-30 – In corso
  17. 1938VEI 3Osservata
    1938-05-15 – In corso
  18. 1937VEI 3Osservata
    1937-09-07 – In corso
  19. 1909VEI ?Stima geologica
    1909-07 – In corso
  20. 1908VEI 2Osservata
    1908-07-15 – In corso
  21. 1899VEI ?Osservata
    1899 – In corso
  22. 1897VEI 2Osservata
    1897-05-16 – In corso
  23. 1894VEI 2Osservata
    1894 – 1895
  24. 1883VEI 3Osservata
    1883-12-31 – In corso
  25. 1865 (±3 anni)VEI 2Osservata
    1865 – 1883
  26. 1842VEI 1Osservata
    1842-03-15 – In corso

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