Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Unnamed
Steam clouds and discolored water from a submarine eruption were observed in January 1999. This unnamed submarine volcano is located 35 km NW of the Niu Aunofo lighthouse on Tongatapu Island. The volcano, whose first documented eruptions took place in 1911 and 1923, was constructed at the southern end of a submarine ridge segment of the Tofua volcanic arc extending NNE to Falcon Island. An ephemeral island was formed during this eruption in 1999; prior to this the summit was 13 m beneath the sea surface. Photo by B. Hutchins, 1999 (published in Taylor, 1999).
Volcano Number:243030
Volcano Name:Unnamed
Country:Tonga
Volcano Type:Submarine
Last Eruption:2017
Elevation:-296m
Tectonic Setting:Subduction zone / Oceanic crust (< 15 km)
Pop. within 5km:0
Pop. within 10km:0
Pop. within 30km:0
Pop. within 100km:88571
Latitude:-20.852
Longitude:-175.55



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
243030 Unnamed 14727 Confirmed Eruption 0 Historical Observations 1911
243030 Unnamed 14728 Confirmed Eruption 0 Historical Observations 1923/7/1
243030 Unnamed 14729 Confirmed Eruption 1 Historical Observations 1999/1/8 1999/1/14
243030 Unnamed 14743 Uncertain Eruption 0 Historical Observations 1970/1/3 1970/1/3
243030 Unnamed 22185 Confirmed Eruption Historical Observations 2017/1/23 2017/1/31
Emissions Data from the Global Volcanism Program of the Smithsonian Institution No emissions data found for this volcano.


Data from the Earthchem Portal


Data from the SESAR Database


Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.