Tofua Arc at 20.9°S

成層火山 · Tonga · 296m (海底)

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. · 写真: Photo by B. Hutchins, 1999 (published in Taylor, 1999).

タイプ: 成層火山
国: Tonga
地域: Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
標高: 296m (海底)
座標: -20.852, -175.550
最終噴火: 2017年
テクトニクス環境: Subduction zone / Oceanic crust (< 15 km)
火山地形: Composite
主要岩石: No Data (checked)

地質学的概要

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.

噴火履歴

概要 (VEI時系列)

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詳細タイムライン

2017年VEI 0観測記録
2017-01-23 ~ 2017-01-31
Submarine
1999年VEI 1観測記録
1999-01-08 ~ 1999-01-14
1970年VEI 0観測記録
1970-01-03 ~ 1970-01-03
1923年VEI 0観測記録
1923-07-01 ~ 進行中
1911年VEI 0観測記録
1911-08 ~ 進行中

外部リンク

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🔗 Smithsonian GVP 原典ページ

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