本文へスキップ
地図に戻る
比較

Unnamed submarine volcano

Tofua Arc at 18.3°S

成層火山 · Tonga · 40m (海底)

写真は一時的に表示できませんGVPで見る
タイプ
成層火山
Tonga
地域
Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
標高
40m (海底)
座標
-18.325, -174.365
最終噴火
2019年
テクトニクス環境
Subduction zone / Oceanic crust (< 15 km)
火山地形
Composite
主要岩石
Dacite
地質学的概要

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.

噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
2001~2003 · 1件 · 最大 VEI 22017~2019 · 1件 · 最大 VEI 320012005201020142017

詳細タイムライン

  1. 2019年VEI 3観測記録
    2019-08-06 ~ 2019-08-08
  2. 2001年VEI 2観測記録
    2001-09-27 ~ 2001-09-28

外部リンク

⚠ 参考情報です。緊急対応には使用しないでください。