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Tonga · Stratovolkan

Tofua Arc at 20.9°S

Tipe
Stratovolkan
Ketinggian
296 m (bawah laut)
Letusan terakhir
2017
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).
Tipe
Stratovolkan
Negara
Tonga
Wilayah
Tonga & Kermadec / Tofua Volcanic Arc
Ketinggian
296 m (bawah laut)
Koordinat
-20.852, -175.550
Letusan terakhir
2017
Kondisi tektonik
Zona subduksi / Kerak samudra (< 15 km)
Bentuk lahan
Komposit
Batuan utama
Tidak ada data
Ringkasan geologi

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.

Riwayat letusan

5 tercatatGlosarium
Ringkasan (VEI dari waktu ke waktu)
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1911~1922 · 1 letusan · VEI maks. 01922~1932 · 1 letusan · VEI maks. 01964~1975 · 1 letusan · VEI maks. 01996~2006 · 1 letusan · VEI maks. 12006~2017 · 1 letusan · VEI maks. 019111932196419852006

Garis waktu rinci

  1. 2017VEI 0Teramati
    2017-01-23 – 2017-01-31
    Submarine
  2. 1999VEI 1Teramati
    1999-01-08 – 1999-01-14
  3. 1970VEI 0Teramati
    1970-01-03 – 1970-01-03
  4. 1923VEI 0Teramati
    1923-07-01 – akhir tidak diketahui
  5. 1911VEI 0Teramati
    1911-08-16 – akhir tidak diketahui

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