Unnamed submarine volcano
Tofua Arc at 18.3°S
Stratovolcano · Tonga · 40m (submarine)
- Type
- Stratovolcano
- Country
- Tonga
- Region
- Tonga-Kermadec Volcanic Regions / Tofua Volcanic Arc
- Elevation
- 40m (submarine)
- Coordinates
- -18.325, -174.365
- Last eruption
- 2019
- Tectonic setting
- Subduction zone / Oceanic crust (< 15 km)
- Landform
- Composite
- Major rock type
- Dacite
Geological summary
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.
Eruption history
Detailed timeline
- 2019VEI 3Observed2019-08-06 – 2019-08-08
- 2001VEI 2Observed2001-09-27 – 2001-09-28
External links
- Not yet on Wikipedia (English). You can contribute on Wikidata.
- 🔗 Smithsonian GVP source page
⚠ For reference only. Not for emergency response.