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Fonuafo'ou

Stratovulcano · Tonga · 17 m (sottomarino)

The active crater of Fonuafo'ou (formerly known as Falcon Island) through the SE breach and a plume that is dispersed to the NW by dominant SE Trade Winds. The ephemeral island in the central part of the Tonga Islands had been named after the British vessel H.M.S. Falcon, which reported the shoal in 1865. This volcano has been the site of eruptions on at least two occasions since the 19th century. By 1949 the island had eroded beneath sea level, but the summit of the volcano remains at shallow depths.
The active crater of Fonuafo'ou (formerly known as Falcon Island) through the SE breach and a plume that is dispersed to the NW by dominant SE Trade Winds. The ephemeral island in the central part of the Tonga Islands had been named after the British vessel H.M.S. Falcon, which reported the shoal in 1865. This volcano has been the site of eruptions on at least two occasions since the 19th century. By 1949 the island had eroded beneath sea level, but the summit of the volcano remains at shallow depths. · Foto: Photo by A. Thompson (published in Taylor and Ewart, 1997). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Tonga
Regione
Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
Altitudine
17 m (sottomarino)
Coordinate
-20.320, -175.420
Ultima eruzione
1936
Contesto tettonico
Subduction zone / Oceanic crust (< 15 km)
Forma vulcanica
Composite
Roccia principale
Andesite / Basaltic Andesite
Sintesi geologica

The ephemeral Fonuafo'ou island in the central part of the Tonga Islands is also known as Falcon Island, named after the British vessel H.M.S. Falcon, which reported a shoal in 1865. Islands up to 6 km long were formed in 1885 and 1927 eruptions; in 1933 the island had a height of more than 145 m. Passing ships often reported "smoke" issuing from the site. The latest explosive activity was reported in 1936. By 1949 the island had eroded beneath sea level, but the summit remains at shallow depths.

Sintesi da Wikipedia

Il Fonuafoʻou è un vulcano sottomarino delle Tonga. Amministrativamente appartiene alla divisione di Haʻapai.

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
1781~1797 · 1 eruzioni · VEI max. 01859~1874 · 1 eruzioni · VEI max. 01874~1890 · 2 eruzioni · VEI max. 31890~1905 · 1 eruzioni · VEI max. 01921~1936 · 4 eruzioni · VEI max. 217811812185918901921

Cronologia dettagliata

  1. 1936VEI 2Osservata
    1936-06 – In corso
  2. 1933VEI 2Osservata
    1933-04 – In corso
  3. 1927VEI 2Osservata
    1927-10-04 – 1928-09
  4. 1921VEI 0Stima geologica
    1921-11 – In corso
  5. 1894VEI 0Stima geologica
    1894-12 – In corso
  6. 1885VEI 3Osservata
    1885-10-12 – 1886
  7. 1877VEI 2Osservata
    1877 – In corso
  8. 1865VEI 0Stima geologica
    1865 – In corso
  9. 1781VEI 0Stima geologica
    1781 – In corso

Link esterni

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