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Bam

Stratovulcano · Papua New Guinea · 685 m

The small 2.4 x 1.6 km island of Bam, seen here from the S, is the summit of a mostly submerged volcano that is one of the more active in Papua New Guinea. A 300-m-wide and 180-m-deep summit crater is source of recent eruptions, which have resulted in the sparsely-vegetated area. A younger cone (center) formed inside a SE-facing landslide scarp. Eruptions recorded since 1872 involved small-to-moderate explosive activity from the summit crater.
The small 2.4 x 1.6 km island of Bam, seen here from the S, is the summit of a mostly submerged volcano that is one of the more active in Papua New Guinea. A 300-m-wide and 180-m-deep summit crater is source of recent eruptions, which have resulted in the sparsely-vegetated area. A younger cone (center) formed inside a SE-facing landslide scarp. Eruptions recorded since 1872 involved small-to-moderate explosive activity from the summit crater. · Foto: Photo by Wally Johnson, 1970 (Australia Bureau of Mineral Resources). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Papua New Guinea
Regione
Southwestern Pacific Volcanic Regions / Bismarck Volcanic Arc
Altitudine
685 m
Coordinate
-3.613, 144.818
Ultima eruzione
1960
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The 1.6 x 2.4 km island of Bam is the summit of a mostly submerged volcano in the Schouten Islands off the coast of New Guinea, ~40 km NNE of the mouth of the Sepik River. A steep-walled summit crater that is 300 m wide and 180 m deep is the source of recent eruptions, which have kept the upper half of the cone sparsely vegetated. A NE-trending landslide scarp extends across the upper part of the andesitic volcano from the SW coast, and a large submarine debris-avalanche deposits lies to the S and SW. The younger summit cone partially buries the eastern side of the collapse scarp. A recent lava platform on the N flank supports the small island's only villages. Eruptions recorded since 1872 have all consisted of small-to-moderate explosive activity from the summit crater.

Sintesi da Wikipedia

Riassunto in inglese

Bam, also known as Biem, is a small volcanic island off the coast of Papua New Guinea (PNG), 40 km (25 mi) north northeast of the Sepik river mouth. It represents the southernmost island of the Schouten Islands. The northern coast of the island is inhabited by a village and coconut groves. Much of the island is forested, except along its south flank. As of 2018, the island has a population of approximately 3,000 people.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1872~1881 · 3 eruzioni · VEI max. 31881~1890 · 3 eruzioni · VEI max. ?1890~1898 · 1 eruzioni · VEI max. ?1898~1907 · 1 eruzioni · VEI max. 21907~1916 · 3 eruzioni · VEI max. 21916~1925 · 2 eruzioni · VEI max. 21934~1942 · 1 eruzioni · VEI max. ?1942~1951 · 2 eruzioni · VEI max. 21951~1960 · 6 eruzioni · VEI max. 218721890191619341951

Cronologia dettagliata

  1. 1960VEI 2Osservata
    1960-04-28 – 1960-07-06
  2. 1959VEI 2Osservata
    1959-04-02 – 1959-10-31
  3. 1958VEI 2Osservata
    1958-03-11 – 1958-04-19
  4. 1958VEI 2Osservata
    1958-09-05 – 1958-09-10
  5. 1957VEI 1Osservata
    1957-10-26 – 1957-10-26
  6. 1954VEI 2Osservata
    1954-08-03 – 1957-01-02
  7. 1947VEI 2Osservata
    1947-03-13 – In corso
  8. 1944VEI 2Osservata
    1944 – In corso
  9. 1936VEI ?Stima geologica
    1936-07 – 1939-04
  10. 1924VEI 2Osservata
    1924 – In corso
  11. 1918VEI ?Osservata
    1918-09-18 – In corso
  12. 1913VEI ?Osservata
    1913 – In corso
  13. 1909VEI 2Osservata
    1909-04-19 – 1909-09-13
  14. 1908VEI 2Osservata
    1908-07-12 – In corso
  15. 1907VEI 2Osservata
    1907-11 – In corso
  16. 1897VEI ?Stima geologica
    1897 – 1898
  17. 1888VEI ?Stima geologica
    1888 – In corso
  18. 1885VEI ?Stima geologica
    1885-05-20 – In corso
  19. 1883VEI ?Stima geologica
    1883-03 – In corso
  20. 1877VEI 3Osservata
    1877-11-13 – In corso
  21. 1874VEI 2Osservata
    1874-05-20 – In corso
  22. 1872 (±4 anni)VEI 3Osservata
    1872 – In corso

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.