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Ambrym

Vulcano a scudo · Vanuatu · 1334 m

The steep-walled craters of the Marum cone complex at the summit of Ambrym volcano, seen from the east. Ambrym contains a 12-km-wide caldera and is one of the most active volcanoes of the New Hebrides arc. A thick pyroclastic sequence, initially dacitic, then basaltic, overlies lava flows of a pre-caldera shield volcano. Post-caldera eruptions, primarily from Marum and Benbow cones, have partially filled the caldera floor and produced lava flows that ponded on the caldera floor or overflowed through gaps in the caldera rim.
The steep-walled craters of the Marum cone complex at the summit of Ambrym volcano, seen from the east. Ambrym contains a 12-km-wide caldera and is one of the most active volcanoes of the New Hebrides arc. A thick pyroclastic sequence, initially dacitic, then basaltic, overlies lava flows of a pre-caldera shield volcano. Post-caldera eruptions, primarily from Marum and Benbow cones, have partially filled the caldera floor and produced lava flows that ponded on the caldera floor or overflowed through gaps in the caldera rim. · Foto: Photo by Karoly Nemeth, 2005 (Massey University). · Wikimedia Commons
Tipo
Vulcano a scudo
Paese
Vanuatu
Regione
Southwestern Pacific Volcanic Regions / Vanuatu Volcanic Arc
Altitudine
1334 m
Coordinate
-16.250, 168.120
Ultima eruzione
2024
Contesto tettonico
Subduction zone / Intermediate crust (15-25 km)
Forma vulcanica
Shield
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Ambrym is a large basaltic volcano with a 12-km-wide caldera formed during a major Plinian eruption with dacitic pyroclastic flows about 1,900 years ago. A thick, almost exclusively pyroclastic sequence, initially dacitic then basaltic, overlies lava flows of a pre-caldera shield volcano. Post-caldera eruptions, primarily from Marum and Benbow cones, have partially filled the caldera floor and produced lava flows that ponded on the floor or overflowed through gaps in the caldera rim. Post-caldera eruptions have also formed a series of scoria cones and maars along a fissure system oriented ENE-WSW. Eruptions have been frequently reported since 1774, though mostly limited to extra-caldera eruptions that would have affected local populations. Since 1950 observations of eruptive activity from cones within the caldera or from flank vents have occurred almost yearly.

Sintesi da Wikipedia

Ambrym è un'isola situata nell'Oceano Pacifico e appartenente alla repubblica di Vanuatu.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
50~247 · 1 eruzioni · VEI max. 61629~1827 · 2 eruzioni · VEI max. 21827~2024 · 57 eruzioni · VEI max. 450445103714321827

Cronologia dettagliata

  1. 2024VEI 0Osservata
    2024-01-13 – 2024-01-16
  2. 2024VEI 0Osservata
    2024-10-31 – 2024-11-02
  3. 2022VEI 1Osservata
    2022-01-25 – 2022-02-02
    Benbow Crater
  4. 2008VEI 2Osservata
    2008-05-23 – 2018-12-17
    Benbow and Marum
  5. 2006VEI 2Osservata
    2006-11-08 – 2007-12-27
    Marum (Mbwelesu)
  6. 1996VEI 1Osservata
    1996-06-16 – 2005-08-16
    Benbow, Marum, Niri Mbelesu, Mbwelesu
  7. 1994VEI 1Osservata
    1994-12-16 – In corso
    Benbow and Marum
  8. 1990VEI 2Osservata
    1990-09-16 – 1991-07-16
    Mbwelesu, Niri Mbwelesu, Niri Taten
  9. 1989VEI 2Osservata
    1989-04-24 – 1989-12-23
    Marum, Benbow, Niri Mbwelesu Taten
  10. 1988VEI 3Osservata
    1988-02-12 – 1988-08-23
    Benbow, Mbwelesu, Marum, Niri Taten
  11. 1986VEI 2Osservata
    1986-11-13 – 1986-11-19
    New cone 3 km east of Marum
  12. 1984VEI 2Osservata
    1984-07-02 – 1986-03-08
  13. 1983VEI 2Osservata
    1983-07-02 – In corso
    Marum
  14. 1981VEI 2Osservata
    1981-02-20 – 1981-09-30
    Benbow, Marum
  15. 1980VEI 3Osservata
    1980-05-16 – 1980-08-18
    Marum
  16. 1979VEI 2Osservata
    1979-01-26 – 1979-02-18
    Benbow
  17. 1979VEI 2Osservata
    1979-06-06 – 1979-09-16
    Benbow, Marum
  18. 1977VEI 2Osservata
    1977-01-20 – 1977-01-28
  19. 1977VEI 2Osservata
    1977-08-16 – 1977-09-30
  20. 1973VEI 3Osservata
    1973-04-15 – 1976-10-14
    Benbow, Mbuelesu, Marum
  21. 1972VEI 3Osservata
    1972-04-15 – 1972-08-15
    Benbow, Marum
  22. 1971VEI 2Osservata
    1971-02-03 – 1971-11-05
    Marum, Benbow
  23. 1967VEI 2Osservata
    1967-07-16 – 1970-08-29
    Marum, Benbow, Mbuelesu
  24. 1964VEI 2Osservata
    1964-02-16 – 1966-09-16
    Marum, Benbow
  25. 1963VEI 2Osservata
    1963-08-30 – 1963-09-23
    Benbow, Marum
  26. 1961VEI 3Osservata
    1961-08-15 – 1963-04-03
    Benbow, Marum, south of Marum
  27. 1960VEI 1Osservata
    1960-09-17 – In corso
    Mbuelesu, Benbow, near Marum
  28. 1959VEI 2Osservata
    1959-04-16 – In corso
    Marum
  29. 1958VEI 2Osservata
    1958-11-18 – In corso
    Benbow and Marum
  30. 1957VEI 1Osservata
    1957-08-26 – 1957-10-16
    Benbow, Marum
  31. 1955VEI 2Osservata
    1955-07-02 – In corso
    Benbow
  32. 1954VEI 2Osservata
    1954-07-02 – In corso
    Benbow
  33. 1953VEI 2Osservata
    1953-05-16 – 1953-10-13
    Benbow, Mbuelesu, S flank of Benbow
  34. 1952VEI 2Osservata
    1952-08-10 – 1952-12-26
    Benbow
  35. 1950VEI 4Osservata
    1950-12-06 – 1951-11-25
    Benbow
  36. 1942VEI 2Osservata
    1942-06-06 – In corso
    NW flank of Benbow
  37. 1938VEI 2Osservata
    1938 – In corso
    Benbow, Marum ?
  38. 1937VEI 2Osservata
    1937-03-27 – 1937-04
    Benbow and west flank
  39. 1935VEI 2Osservata
    1935-09 – 1936-01
    Benbow
  40. 1929VEI 2Osservata
    1929-06-28 – 1929-07-01
    Benbow, west flank, Marum
  41. 1927VEI ?Osservata
    1927-01-27 – 1927-01-27
  42. 1915VEI 2Osservata
    1915-10-20 – In corso
    Marum, crater at SE point
  43. 1913VEI 3Osservata
    1913-10-14 – 1914
    Benbow, west flank, Marum
  44. 1912VEI ?Osservata
    1912 – In corso
    Marum ?, west flank ?
  45. 1910VEI 0Osservata
    1910 – In corso
    Base of Marum
  46. 1909VEI 2Osservata
    1909-07-28 – In corso
  47. 1908VEI 2Osservata
    1908 – In corso
  48. 1898VEI 1Osservata
    1898-03-26 – In corso
  49. 1894VEI 3Osservata
    1894-10-15 – 1895-02-10
    Benbow and west flank
  50. 1888VEI 2Osservata
    1888-02-24 – 1888-04
    SE flank (6 km from SE Point), Marum
  51. 1886VEI 2Osservata
    1886-07 – In corso
  52. 1884VEI 2Osservata
    1884 – In corso
    Marum and/or Benbow
  53. 1883VEI 2Osservata
    1883 – In corso
    Marum
  54. 1875VEI ?Osservata
    1875-05-03 – In corso
  55. 1871VEI 2Osservata
    1871 – In corso
  56. 1870VEI ?Stima geologica
    1870 – In corso
  57. 1863VEI 2Osservata
    1863 – 1864
  58. 1820VEI ?Osservata
    1820 – In corso
    West flank
  59. 1774VEI 2Osservata
    1774-07-02 – In corso
  60. 50 (±100 anni)VEI 6Stima geologica
    50 – In corso

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