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Rokatenda
Paluweh, also known as Rokatenda, is a stratovolcano that forms the small island of Palu'e, north of Flores Island in Sikka Regency in the province of East Nusa Tenggara, Indonesia. While the volcano rises about above the sea floor, its cone rises just above sea level and is the highest point on the island. The broad summit region contains overlapping craters up to wide along with several lava domes. Several flank vents occur along a northwest trending fissure. __NOTOC__ Eruption history Eruptions with a Volcanic Explosivity Index (VEI) of 3 have occurred in 1650 ± 50, 1928 and 1972. On 16 January 2005, there were signs of a possible eruption, causing the mountain to be placed under alert status. 1928 The biggest eruption (VEI 3) occurred on August 4, – September 25, 1928, the eruption caused a tsunami and earthquake. The population of Palu'e island was 266 people at that period. 2012–2013 In late 2012 the mountain became quite active, spewing volcanic ash. In Novemb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sikka Regency
Sikka is a regency within East Nusa Tenggara province, Indonesia, on the island of Flores. It covers an area of 1,731.91 km2 and had a population of 300,301 at the 2010 census and 321,953 at the 2020 Census; the official estimate as at mid 2021 was 324,252. The capital is the town of Maumere, which comprises the districts of Alok Barat, Alok and Alok Timur (although the last two also include a number of notable islands to the north of Flores). Administrative districts The regency is divided into twenty-one districts (''kecamatan''), tabulated below with their areas and their populations at the 2010 census and the 2020 census.Badan Pusat Statistik, Jakarta, 2021. The table also includes the locations of the district administrative centres, the number of villages (rural ''desa'' and urban ''kelurahan'') in each district, and its post code. Note: (a) Palu'e is an island district, situated off the north coast of Flores. (b) includes the offshore islands of Pulau Pamana Besar a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palu'e
Palu'e Island (often referred to as ''Palu Island'') is located north of Flores Island in the Flores Sea. It is part of Lesser Sunda Islands. Palu'e island is under the administrative region of Sikka regency of East Nusa Tenggara province, Indonesia. The island has an area of 41 km² and population of 9,497 people (at the 2020 Census) in eight mountain villages. There are no roads or vehicles on the island. Palu'e can be reached from Maumere, a city in Flores, which takes six hours by wooden motorboat. The language spoken on the island is the Polynesian language Paluwe. Rokatenda (Paluweh) volcano is located in the northern region of Palu'e. The volcano erupted on August 10, 2013 and killed six people, three adults and three children. References See also *Palu'e language Palu'e (also spelled Palue and Paluqe; native name Lu'a) is a Malayo-Polynesian language spoken on Palu'e Island, Indonesia Indonesia, officially the Republic of Indonesia, is a country ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth Observing-1
Earth Observing-1 (EO-1) is a decommissioned NASA Earth observation satellite created to develop and validate a number of instrument and spacecraft bus breakthrough technologies. It was intended to enable the development of future Earth imaging observatories that will have a significant increase in performance while also having reduced cost and mass. The spacecraft was part of the New Millennium Program. It was the first satellite to map active lava flows from space; the first to measure a facility's methane leak from space; and the first to track re-growth in a partially logged Amazon forest from space. EO-1 captured scenes such as the ash after the World Trade Center attacks, the flooding in New Orleans after Hurricane Katrina, volcanic eruptions and a large methane leak in southern California. Overview Its Advanced Land Imager (ALI) measured nine different wavelengths simultaneously, instead of the seven measured by the imager in Landsat 7. This permitted a greater flexibility ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Nusa Tenggara
East Nusa Tenggara ( id, Nusa Tenggara Timur – NTT; pt, Sonda Oriental) is the southernmost province of Indonesia. It comprises the eastern portion of the Lesser Sunda Islands, facing the Indian Ocean in the south and the Flores Sea in the north. It consists of more than 500 islands, with the largest ones being Sumba, Flores, and the western part of Timor; the latter shares a land border with the separate nation of East Timor. The province is subdivided into twenty-one regencies and the regency-level city of Kupang, which is the capital and largest city. A Christian-majority region, East Nusa Tenggara is the only Indonesian province where Roman Catholicism is the predominant religion. The province has a total area of 47,931.54 km2 and a population of 5,325,566 at the 2020 Census; the official estimate as at mid 2021 was 5,387,738. Economically, East Nusa Tenggara still remains one of the least developed provinces in Indonesia. It currently focuses on expanding the touris ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcano
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . Stratovolcanoes are sometimes called composite volcanoes because of their composite stratified structure, built up from sequential outpourings of erupted materials. They are among the most common types of volcanoes, in contrast to the less common shield volca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stratovolcano
A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . Stratovolcanoes are sometimes called composite volcanoes because of their composite stratified structure, built up from sequential outpourings of erupted materials. They are among the most common types of volcanoes, in contrast to the less common shield volca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flores
Flores is one of the Lesser Sunda Islands, a group of islands in the eastern half of Indonesia. Including the Komodo Islands off its west coast (but excluding the Solor Archipelago to the east of Flores), the land area is 15,530.58 km2, and the population was 1,878,875 in the 2020 Census (including various offshore islands); the official estimate as at mid 2021 was 1,897,550. The largest towns are Maumere and Ende. The name ''Flores'' is the Portuguese and Spanish word for "Flowers". Flores is located east of Sumbawa and the Komodo islands, and west of the Solor Islands and the Alor Archipelago. To the southeast is Timor. To the south, across the Sumba Strait, is Sumba island and to the north, beyond the Flores Sea, is Sulawesi. Among all islands containing Indonesian territory, Flores is the 10th most populous after Java, Sumatra, Borneo ( Kalimantan), Sulawesi, New Guinea, Bali, Madura, Lombok, and Timor and also the 10th biggest island of Indonesia. Until the arr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eruption
Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity, while others may display an entire sequence of types all in one eruptive series. There are three different types of eruptions: * Magmatic eruptions are the most well-observed type of eruption. They involve the decompression of gas within magma that propels it forward. * Phreatic eruptions are driven by the superheating of steam due to the close proximity of magma. This type exhibits no magmatic release, instead causing the granulation of existing rock. * Phreatomagmatic eruptions are driven by the direct interaction of magma and water, as opposed to phreatic erupti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsunami
A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations, landslides, glacier calvings, meteorite impacts and other disturbances) above or below water all have the potential to generate a tsunami. Unlike normal ocean waves, which are generated by wind, or tides, which are in turn generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the displacement of water from a large event. Tsunami waves do not resemble normal undersea currents or sea waves because their wavelength is far longer. Rather than appearing as a breaking wave, a tsunami may instead initially resemble a rapidly rising tide. For this reason, it is often referred to as a tidal wave, although this usage is not favoured by the scientific community because it might give ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Dome
In volcanology, a lava dome is a circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions on Earth are lava dome forming. The geochemistry of lava domes can vary from basalt (e.g. Semeru, 1946) to rhyolite (e.g. Chaiten, 2010) although the majority are of intermediate composition (such as Santiaguito, dacite-andesite, present day) The characteristic dome shape is attributed to high viscosity that prevents the lava from flowing very far. This high viscosity can be obtained in two ways: by high levels of silica in the magma, or by degassing of fluid magma. Since viscous basaltic and andesitic domes weather fast and easily break apart by further input of fluid lava, most of the preserved domes have high silica content and consist of rhyolite or dacite. Existence of lava domes has been suggested for some domed structures on the Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyroclastic Flow
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of but is capable of reaching speeds up to . The gases and tephra can reach temperatures of about . Pyroclastic flows are the most deadly of all volcanic hazards and are produced as a result of certain explosive eruptions; they normally touch the ground and hurtle downhill, or spread laterally under gravity. Their speed depends upon the density of the current, the volcanic output rate, and the gradient of the slope. Origin of term The word ''pyroclast'' is derived from the Greek (''pýr''), meaning "fire", and (''klastós''), meaning "broken in pieces". A name for pyroclastic flows which glow red in the dark is (French, "burning cloud"); this was notably used to describe the disastrous 1902 eruption of Mount Pelée on Martinique, a French ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
