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The Tonga Trench is an oceanic trench located in the southwestern Pacific Ocean. It is the deepest trench in the Southern hemisphere and the second deepest on Earth after the Mariana Trench. The fastest plate-tectonic velocity on Earth is occurring at this location, as the Pacific Plate is being subducted westward in the trench.
George Tupou I, originally known as Tāufaʻāhau I, was the first king of modern Tonga. He adopted the name Siaosi, the Tongan equivalent of George, after King George III of the United Kingdom, when he was baptized in 1831. His nickname was Lopa-ukamea, meaning iron cable.
The Australian plate is a major tectonic plate in the eastern and, largely, southern hemispheres. Originally a part of the ancient continent of Gondwana, Australia remained connected to India and Antarctica until approximately 100 million years ago when India broke away and began moving north. Australia and Antarctica had begun rifting by 96 million years ago and completely separated a while after this, some believing as recently as 45 million years ago, but most accepting presently that this had occurred by 60 million years ago.
Niuatoputapu is a volcanic island in the island nation of Tonga, Pacific Ocean. Its highest point is 157 metres (515 ft), and its area is 16 square kilometres (6.2 sq mi). Its name means sacred island. Older names for the island are Traitors Island or Keppel Island.
Vavaʻu is an island group, consisting of one large island and 40 smaller ones, in Tonga. It is part of Vavaʻu District, which includes several other individual islands. According to tradition, the Maui god created both Tongatapu and Vavaʻu, but put a little more effort into the former. Vavaʻu rises 204 m (669 ft) above sea level at Mount Talau. The capital is Neiafu, situated at the Port of Refuge.
Haʻapai is a group of islands, islets, reefs, and shoals in the central part of Tonga. It has a combined land area of 109.30 square kilometres (42.20 sq mi). The Tongatapu island group lies to its south, and the Vavaʻu group lies to its north. Seventeen of the Haʻapai islands are inhabited. Their combined population is 5,419. The highest point in the Ha‘apai group, and in all of Tonga, is on Kao, which rises almost 1,050 metres (3,440 ft) above sea level.
The 2006 Tonga earthquake occurred on 4 May at 04:26:35 local time with a moment magnitude of 8.0 and a maximum Mercalli intensity of VII. One injury occurred and a non-destructive tsunami was observed.
The Kermadec plate is a long and narrow tectonic plate located west of the Kermadec Trench in the south Pacific Ocean. Also included on this tectonic plate is a small portion of the North Island of New Zealand and the Kermadec Islands. It is separated from the Australian plate by a long divergent boundary which forms a back-arc basin. This area is highly prone to earthquakes and tsunamis.
The Niuafoʻou Plate is a small tectonic plate located west of the islands of Tonga. This plate is sandwiched between the Pacific Plate to the north, the very unstable Tonga Plate to the east and the Australian Plate to the west. It is primarily surrounded by divergent boundaries. This plate is riddled with active faults thus making the area extremely earthquake prone.
The 2009 Tonga undersea volcanic eruption began on 16 March 2009, near the island of Hunga Tonga, approximately 62 kilometres (39 mi) from the Tongan capital of Nukuʻalofa. The volcano is in a highly active volcanic region that represents a portion of the Pacific Ring of Fire. It is estimated that there are up to 36 undersea volcanoes clustered together in the area.
The 2009 Samoa earthquake and tsunami took place on 29 September 2009 in the southern Pacific Ocean adjacent to the Kermadec-Tonga subduction zone. The submarine earthquake occurred in an extensional environment and had a moment magnitude of 8.1 and a maximum Mercalli intensity of VI (Strong). It was the largest earthquake of 2009. The earthquake initiated with a normal-faulting event with a magnitude of 8.1. Within two minutes of the earthquake rupture, two large magnitude 7.8 earthquakes occurred on the subduction zone interface. The two magnitude 7.8 earthquakes had a combined magnitude equivalent to 8.0. The event can be considered a doublet earthquake.
Hihifo is the main village on the island of Niuatoputapu in the Kingdom of Tonga. Hihifo is situated on the west side of Niuatoputapu and is the main centre for public and government facilities that serve the island residents, including a post office and police station. The other two villages on Niuatoputapu are Falehau and Vaipoa.
The 1977 Tonga earthquake took place on 23 June at 01:08:33 local time some 200 km southwest of Tongatapu, with shocks affecting all islands of the kingdom of Tonga. The earthquake measured 8.0 on the moment magnitude scale and had a maximum intensity of VIII (Severe) on the Mercalli intensity scale.
References
- ↑ "M 7.4 - 292 km SW of Vaini, Tonga". United States Geological Survey.
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