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Bagana

Kerucut 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
Tipe
Kerucut lava
Negara
Papua New Guinea
Wilayah
Southwestern Pacific Volcanic Regions / Bougainville Volcanic Arc
Ketinggian
1855 m
Koordinat
-6.137, 155.196
Letusan terakhir
2026
Kondisi tektonik
Subduction zone / Crustal thickness unknown
Bentuk lahan
Composite
Batuan utama
Andesite / Basaltic Andesite
Ringkasan geologi

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.

Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
1842~1858 · 1 letusan · VEI maks. 11858~1874 · 1 letusan · VEI maks. 21874~1889 · 1 letusan · VEI maks. 31889~1905 · 3 letusan · VEI maks. 21905~1921 · 2 letusan · VEI maks. 21937~1953 · 7 letusan · VEI maks. 41953~1968 · 8 letusan · VEI maks. 31968~1984 · 2 letusan · VEI maks. 21984~2000 · 1 letusan · VEI maks. 218421874192119531984

Garis waktu rinci

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

Tautan eksternal

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