Curacoa is a
submarine volcano
Submarine volcanoes are underwater vents or fissures in the Earth's surface from which magma can erupt. Many submarine volcanoes are located near areas of tectonic plate formation, known as mid-ocean ridges. The volcanoes at mid-ocean ridge ...
located
south
South is one of the cardinal directions or compass points. The direction is the opposite of north and is perpendicular to both east and west.
Etymology
The word ''south'' comes from Old English ''sūþ'', from earlier Proto-Germanic ''*sunþa ...
of the
Curacoa Reef in northern
Tonga
Tonga (, ; ), officially the Kingdom of Tonga ( to, Puleʻanga Fakatuʻi ʻo Tonga), is a Polynesian country and archipelago. The country has 171 islands – of which 45 are inhabited. Its total surface area is about , scattered over in ...
. The reef is 24fm North of
Tafahi
Tafahi is a small () island in the north of the Tonga archipelago, in fact closer to Savaii (Samoa) than to the main islands of Tonga. It is only north-northeast away from Niuatoputapu, and fishermen commute in small outboard motorboats almost d ...
in the
Niua Islands.
Eruptions were observed in 1973 and 1979 from two separate vents. The 1973 eruption produced a large
raft
A raft is any flat structure for support or transportation over water. It is usually of basic design, characterized by the absence of a hull. Rafts are usually kept afloat by using any combination of buoyant materials such as wood, sealed barrel ...
of
dacitic
Dacite () is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. ...
pumice
Pumice (), called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough-textured volcanic glass, which may or may not contain crystals. It is typically light-colored. Scoria is another vesicular v ...
, and had a
volcanic explosivity index (VEI) of 3.
See also
*
List of volcanoes in Tonga
This is a list of active and extinct volcanoes in Tonga.
References
* See especiallFigure 1
* D. Stanley; South Pacific handbook
* Government of Tonga, official 1962 land survey
{{reflist
Tonga
Volcanoes
A volcano is a rupture in t ...
References
Volcanoes of Tonga
Submarine volcanoes
Active volcanoes
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