Unnamed submarine volcano
Tofua Arc at 18.3°S
Stratovulcano · Tonga · 40 m (sottomarino)
- Tipo
- Stratovulcano
- Paese
- Tonga
- Regione
- Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
- Altitudine
- 40 m (sottomarino)
- Coordinate
- -18.325, -174.365
- Ultima eruzione
- 2019
- Contesto tettonico
- Subduction zone / Oceanic crust (< 15 km)
- Forma vulcanica
- Composite
- Roccia principale
- Dacite
Sintesi geologica
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.
Storia delle eruzioni
Cronologia dettagliata
- 2019VEI 3Osservata2019-08-06 – 2019-08-08
- 2001VEI 2Osservata2001-09-27 – 2001-09-28
Link esterni
- Non ancora su Wikipedia (Italiano). Puoi contribuire su Wikidata.
- 🔗 Pagina originale Smithsonian GVP
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.