|
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 the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metis Shoal
Metis Shoal, also known as Lateiki Island, is a volcanic island at the top of a submarine volcano in Tonga, located between the islands of Kao and Late. The current island formed in October 2019, when a smaller island disappeared after 24 years. History The shoal was named by the captain of the HMS ''Metis'' in 1875, who found a small volcanic island protruding from the ocean. The island was reported as being 200m long and 37m high by HMS ''Sappho'' in 1878, and as 480m high in 1890, but had eroded away completely by 1898, leaving a shoal covered by 4m of water. Eruptions and short-lived islands have been reported as far back as 1781, according to the Global Volcanism Program. In December 1967 an eruption produced another short-lived island, which disappeared by the end of 1968. An eruption in 1979 discharged large amounts of pumice, and formed an island 16km in diameter. The new island was named "Lateiki" ("lies besides Late") and claimed by Tonga in a flag-raising ceremony, but ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lists Of Volcanoes
These lists cover volcanoes by type and by location. Type * List of extraterrestrial volcanoes * List of largest volcanic eruptions * List of shield volcanoes * List of stratovolcanoes * List of subglacial volcanoes * List of submarine volcanoes * List of volcanoes by elevation Location Africa * List of volcanoes in Algeria * List of volcanoes in Cameroon * List of volcanoes in Cape Verde *List of volcanoes in Chad * List of volcanoes in the Comoros *List of volcanoes in the Democratic Republic of the Congo * List of volcanoes in Djibouti *List of volcanoes in Equatorial Guinea * List of volcanoes in Eritrea *List of volcanoes in Ethiopia *List of volcanoes in Kenya * List of volcanoes in Libya *List of volcanoes in Madagascar *In Nigeria all the volcanoes are in the Biu Plateau *List of volcanoes in Réunion *List of volcanoes in Rwanda *São Tomé and Príncipe has only one volcano, Pico de São Tomé * List of volcanoes in South Africa *List of volcanoes in Sudan *List of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Petrology
The ''Journal of Petrology'' is a monthly peer-reviewed academic journal focused on the field of igneous and metamorphic petrology and petrogenesis. The journal is published by the Oxford University Press and indexed in the Science Citation Index. The editor-in-chief is Georg Zellmer (Massey University). Abstracting and indexing The journal is abstracted and indexed in: *Aquatic Sciences and Fisheries Abstracts *Chemical Abstracts *CAB Abstracts *Current Contents/Physical, Chemical and Earth Sciences *GEOBASE * ProQuest databases *Science Citation Index According to the ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 4.515. References External links * English-language journals 1960 establishments in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcano F (Tonga)
Volcano F (also known as Volcano 0403-091) is a submarine volcano in the Tonga Islands of the South Pacific Ocean. It is located northwest of Vavaʻu, between Late and Fonualei on the Tofua ridge. It is part of the highly active Kermadec-Tonga subduction zone and its associated volcanic arc, which extends from New Zealand north-northeast to Fiji, and is formed by the subduction of the Pacific Plate under the Indo-Australian Plate. The volcano was first mapped in 2004, and assigned the name "Volcano F". It consists of a large (8.7 x 6 km) caldera with a depth of 670 - 720 m. The caldera walls are 200 - 300 m high, with the highest peak on the rim only below sea level. The entire volcano rises from the sea-floor. Eruption history The volcano erupted in September 2001, resulting in an eruption column and a pumice raft which later reached the coast of Australia. In August 2019 a pumice raft was discovered floating in the Pacific Ocean in Tonga. The pumice raft was observed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tofua
Tofua is a volcanic island in Tonga. Located in the Haʻapai island group, it is a steep-sided composite cone with a summit caldera. It is part of the highly active Kermadec-Tonga subduction zone and its associated volcanic arc, which extends from New Zealand north-northeast to Fiji, and is formed by the subduction of the Pacific Plate under the Indo-Australian Plate. It lies about above a very active seismic zone.Ewart, A.; Bryan, W.B.; and Gill, J.B. "Mineralogy and Geochemistry of the Younger Volcanic Islands of Tonga, S.W. Pacific." ''Journal of Petrology.'' 14:3 (1973). It is connected to the nearby island of Kao by a submarine ridge. The island is a national park. Geography and geology The island is oval, measuring approximately 80 square kilometers. Its sides rise steeply to the rim of the caldera, which is partially filled by a volcanic crater lake with a depth of . The caldera was formed by a major eruption around 1,000 years BP, which left deposits up to thick on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 daily between the two. The island has a population of 14 (in 2021). Other names for Tafahi are Cocos Eylant (coconut island) or Boscawen island. Geography Tafahi is a volcanic island and has the typical cone shape of a stratovolcano. The mountain is called Piu-o-Tafahi (fanpalm of Tafahi) and is high. (The island, , is smaller than Niuatoputapu, but higher). The soil is extremely suited for growing kava and vanilla, whose exports to the rest of Tonga and beyond is the main occupation of the population. The harbour (merely an opening in the fringing reef, only passable by small boats) is at the northwest of the island. A steep staircase leads up to the village, with about 69 residents at the census of 2001, located on a plateau on the nor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niuatoputapu
Niuatoputapu is a high island in the island nation of Tonga, Pacific Ocean. Its highest point is , and its area is . Its name means ''sacred island''. Older European names for the island are Traitors Island or Keppel Island. Niuatoputapu is located in the north of the Tonga island group, away from Vavau near the border with Samoa. Its closest neighbours are the small island of Tafahi, which is only to the north-northeast, and the island of Niuafo'ou. Those three islands together form the administrative division of the Niuas. Niuatoputapu Airport accepts international flights. The population was 719 in 2021. Until several centuries ago, the inhabitants spoke the Niuatoputapu language, but it was replaced by the Tongan language and went extinct. Nevertheless, the variety of Tongan spoken on Niuatoputapu contains elements of Samoan, Uvean, and Futunan. Geography Niuatoputapu’s highest central area, just beside Vaipoa, is a hill only high. It is the eroded remnant of a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Niuatahi
Niuatahi or also called Volcano O is a submarine volcano located in the far northern territory of Tonga. Since the cone in the middle is named Motutahi, the volcano is sometimes referred to as Niuatahi-Motutahi. Despite not having any record of any eruption, Niuatahi does have a record of recent hydrothermal activity. Etymology Niuatahi was named by the Tonga Ministry of Lands, Environment, Climate Change and Natural Resources. In the Tongan language, Niuatahi means ''sea''. The name Motutahi means ''island in the sea'' in the Tongan language. Geography The volcano can be found approximately northwest of Niuatoputapu and southwest of the Samoan Islands. It is also located southwest of the far more known and more active West Mata submarine volcano, located in the same volcanic group as Niuatahi. An active ridge can also be found just west of the caldera walls. Structure Niuatahi is a submarine volcano mostly known for its' circular shape and enormous width. It is in diameter an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late (Tonga)
Late Island is an uninhabited volcanic island southwest of Vavaʻu in the kingdom of Tonga. Geography The small, 6-km-wide circular island of Late, lying along the Tofua volcanic arc about 55 km WSW of the island of Vavau, contains a 400-m-wide, 150-m-deep summit crater with an ephemeral lake. The largely submerged basaltic andesite to andesitic volcano rises 1500 m from the sea floor, with its conical summit reaching 540 m above sea level. Cinder cones are found north of the summit crater, west and north of a semicircular plateau 100–150 m below the summit, and on the NW coast. A graben-like structure on the NE flank contains two large pit craters, the lower of which is partially filled by a saltwater lake. Only two eruptions have occurred in historical time, both from NE-flank craters, which produced explosive activity and possible lava flows in 1790 and 1854. History It was discovered by Spanish naval officer Francisco Mourelle de la Rúa on 27 February 1781, on board ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 southern Pacific Ocean. As of 2021, according to Johnson's Tribune, Tonga has a population of 104,494, 70% of whom reside on the main island, Tongatapu. The country stretches approximately north-south. It is surrounded by Fiji and Wallis and Futuna (France) to the northwest; Samoa to the northeast; New Caledonia (France) and Vanuatu to the west; Niue (the nearest foreign territory) to the east; and Kermadec (New Zealand) to the southwest. Tonga is about from New Zealand's North Island. First inhabited roughly 2,500 years ago by the Lapita civilization, Tonga's Polynesian settlers gradually evolved a distinct and strong ethnic identity, language, and culture as the Tongan people. They were quick to establish a powerful footing acr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Tafahi")
