Tofua Arc at 20.9°S

Stratovolkan · Tonga · 296 m (bawah laut)

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 Volcanic Regions / Tofua Volcanic Arc
Ketinggian: 296 m (bawah laut)
Koordinat: -20.852, -175.550
Letusan terakhir: 2017
Kondisi tektonik: Subduction zone / Oceanic crust (< 15 km)
Bentuk lahan: Composite
Batuan utama: No Data (checked)

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

Ringkasan (VEI dari waktu ke waktu)

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Garis waktu rinci

2017VEI 0Teramati
2017-01-23 – 2017-01-31
Submarine
1999VEI 1Teramati
1999-01-08 – 1999-01-14
1970VEI 0Teramati
1970-01-03 – 1970-01-03
1923VEI 0Teramati
1923-07-01 – Berlangsung
1911VEI 0Teramati
1911-08 – Berlangsung

Tautan eksternal

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