Unnamed submarine volcano
Tofua Arc at 18.3°S
成層火山 · Tonga · 40m (海底)
- タイプ
- 成層火山
- 国
- 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
詳細タイムライン
- 2019年VEI 3観測記録2019-08-06 ~ 2019-08-08
- 2001年VEI 2観測記録2001-09-27 ~ 2001-09-28
外部リンク
- 日本語版Wikipediaには未登録です。Wikidataで作成できます。
- 🔗 Smithsonian GVP 原典ページ
⚠ 参考情報です。緊急対応には使用しないでください。