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- Q16902456 subject Q15964250.
- Q16902456 subject Q8804205.
- Q16902456 abstract "Vai Lahi (Tongan: Big water) is the central crater lake of the Tongan island of Niuafoʻou. The island is the most northerly island of Tonga, is the most northerly island in the kingdom of Tonga, and is located some 570 km north of the kingdom's main island, Tongatapu. Niuafoʻou is annular in shape, the rim of an active volcano. The island ring encloses two large lakes, Vai Lahi and the much smaller Vai Siʻi (also known as Vai Mataʻaho), plus some eight much smaller ponds.Vai Lahi is a roughly circular crater lake with a diameter of 4 kilometres. Its surface, reported as 23 metres above sea level in 1935, is now believed to be close to sea level. The same survey which reported these new findings also discovered that the depth of the lake is considerably greater than previously thought; long thought to reach a maximum of 84 metres, it has recently been found to be 121 metres deep at its deepest point. The lake has a perimeter of 15.5 kilometres, and a surface area of 13.6 km2 (5.3 sq mi). Vai Lahi has a volume of almost one cubic kilometre. The waters of the lake are warm and mildly alkaline.The lake contains three islands and a submerged island that appears when the water level drops. The largest of these islands is the central Motu Lahi (Big island). The other islands are Motu Molemole, Motu Siʻi, and the ephemeral Motu ʻAʻAli.Niuafoʻou has been sporadically active throughout recorded history, with six eruptions during the twentieth century. The most violent of these, in 1946, resulted in the evacuation of the island (the first groups of inhabitants were allowed to return to the island in 1958).".
- Q16902456 thumbnail Niuafoʻou.gif?width=300.
- Q16902456 wikiPageExternalLink 1840658.
- Q16902456 wikiPageWikiLink Q15964250.
- Q16902456 wikiPageWikiLink Q34094.
- Q16902456 wikiPageWikiLink Q485742.
- Q16902456 wikiPageWikiLink Q620452.
- Q16902456 wikiPageWikiLink Q678.
- Q16902456 wikiPageWikiLink Q8804205.
- Q16902456 wikiPageWikiLink Q966941.
- Q16902456 point "-15.605 -175.64".
- Q16902456 type SpatialThing.
- Q16902456 comment "Vai Lahi (Tongan: Big water) is the central crater lake of the Tongan island of Niuafoʻou. The island is the most northerly island of Tonga, is the most northerly island in the kingdom of Tonga, and is located some 570 km north of the kingdom's main island, Tongatapu. Niuafoʻou is annular in shape, the rim of an active volcano.".
- Q16902456 label "Vai Lahi".
- Q16902456 lat "-15.605".
- Q16902456 long "-175.64".
- Q16902456 depiction Niuafoʻou.gif.