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There are no activity reports for Unnamed.
Summary of eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1999 Jan 8 (in or before)||1999 Jan 14 (?)||Confirmed||1||Historical Observations|
|1923 Jul 1||Unknown||Confirmed||0||Historical Observations|
|1911 Aug||Unknown||Confirmed||0||Historical Observations|
The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.
Richard J J, 1962. Kermadec, Tonga and Samoa. Catalog of Active Volcanoes of the World and Solfatara Fields, Rome: IAVCEI, 13: 1-38.
Smithsonian Institution-GVN, 1990-. [Monthly event reports]. Bull Global Volc Network, v 15-33.
Taylor P W, 1999. A volcanic hazards assessment following the January 1999 eruption of Submarine Volcano III Tofua volcanic arc, Kingdom of Tonga. Aust Volc Invest Occ Rpt, 99/01: 1-8.
An unnamed submarine volcano is located 35 km NW of the Niu Aunofo lighthouse on Tongatapu Island. Tongatapu is a coral island at the southern end of an island chain paralleling the Tofua volcanic arc on the east. 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. Prior to an eruption in 1999, when an ephemeral island was formed, the volcano rose nearly 1400 m to within 13 m of the sea surface.