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Tofua Arc at 20.9°S

Stratovulcano · Tonga · 296 m (sottomarino)

A plume and discolored water from a submarine eruption were observed in January 1999. This unnamed submarine volcano, 35 km NW of the Niu Aunofo lighthouse on Tongatapu Island, was constructed at the southern end of a submarine ridge segment of the Tofua volcanic arc extending NNE to Falcon Island. The first documented eruptions took place in 1911 and 1923. An ephemeral island was formed during this eruption in 1999; prior to this the summit was 13 m beneath the sea surface.
A plume and discolored water from a submarine eruption were observed in January 1999. This unnamed submarine volcano, 35 km NW of the Niu Aunofo lighthouse on Tongatapu Island, was constructed at the southern end of a submarine ridge segment of the Tofua volcanic arc extending NNE to Falcon Island. The first documented eruptions took place in 1911 and 1923. An ephemeral island was formed during this eruption in 1999; prior to this the summit was 13 m beneath the sea surface. · Foto: Photo by B. Hutchins, 1999 (published in Taylor, 1999).
Tipo
Stratovulcano
Paese
Tonga
Regione
Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
Altitudine
296 m (sottomarino)
Coordinate
-20.852, -175.550
Ultima eruzione
2017
Contesto tettonico
Subduction zone / Oceanic crust (< 15 km)
Forma vulcanica
Composite
Roccia principale
No Data (checked)
Sintesi geologica

An unnamed submarine volcano is located along the Tofua Volcanic Arc 35 km NW of the Niu Aunofo lighthouse on Tongatapu Island. The first documented eruptions took place in 1911 and 1923; an ephemeral island was formed in 1999. A submarine eruption in January 2017 produced discolored water visible in satellite imagery.

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
1911~1922 · 1 eruzioni · VEI max. 01922~1932 · 1 eruzioni · VEI max. 01964~1975 · 1 eruzioni · VEI max. 01996~2006 · 1 eruzioni · VEI max. 12006~2017 · 1 eruzioni · VEI max. 019111932196419852006

Cronologia dettagliata

  1. 2017VEI 0Osservata
    2017-01-23 – 2017-01-31
    Submarine
  2. 1999VEI 1Osservata
    1999-01-08 – 1999-01-14
  3. 1970VEI 0Osservata
    1970-01-03 – 1970-01-03
  4. 1923VEI 0Osservata
    1923-07-01 – In corso
  5. 1911VEI 0Osservata
    1911-08 – In corso

Link esterni

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