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Unnamed submarine volcano

Tofua Arc at 18.3°S

Stratovolkan · Tonga · 40 m (bawah laut)

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Tipe
Stratovolkan
Negara
Tonga
Wilayah
Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
Ketinggian
40 m (bawah laut)
Koordinat
-18.325, -174.365
Letusan terakhir
2019
Kondisi tektonik
Subduction zone / Oceanic crust (< 15 km)
Bentuk lahan
Composite
Batuan utama
Dacite
Ringkasan geologi

A submarine volcano along the Tofua Volcanic Arc ~45 km NW of Vava'u Island was first observed in September 2001, ~35 km S of Fonualei and 60 km NE of Late volcano. The site of the eruption is at a bathymetric depth of ~300 m. T-phase waves were recorded on 27-28 September 2001, and on the 27th local fishermen observed an ash-rich eruption column that rose above the ocean surface. No eruptive activity was reported after the 28th, but water discoloration was documented the following month. In early November rafts and strandings of dacitic pumice were reported along the coasts of Kadavu and Viti Levu in Fiji. The depth of the summit of the submarine cone following the eruption was determined to be 40 m during a 2007 survey; the crater of the 2001 eruption was open to the E.

Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)
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2001~2003 · 1 letusan · VEI maks. 22017~2019 · 1 letusan · VEI maks. 320012005201020142017

Garis waktu rinci

  1. 2019VEI 3Teramati
    2019-08-06 – 2019-08-08
  2. 2001VEI 2Teramati
    2001-09-27 – 2001-09-28

Tautan eksternal

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