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Nikkō Seamount
Nikkō Seamount () is a submarine volcano in the Volcano Islands region of Japan. It is the southernmost volcano of Japan. Geography The Nikkō caldera is a volcanic complex consisting of a caldera and 2 other cones that are the active parts of the volcano which last had an activity in 1979. It is south-southeast of Iwo Jima and north-northwest of Saipan. Marine life Nikkō is home to many underwater species, specifically 14 species which come from 12 families including the ''Symphurus thermophilus'', which are species that live in hydrothermal vent environments, which Nikkō has hydrothermal vents considering it is an active volcano. The seamount does also have endemic crustaceans, including the '' Paragiopagurus ventilatus''. Activity The volcano isn't the most active volcano, however the last activity recorded was in 1979. In July 12, 1979, a pale-green and wide patch of discolored water was observed over Nikkō Seamount. 2006 expedition In 2006, the NOAA Ocean Explorer prog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands—Hokkaido, Honshu, Shikoku, and Kyushu—and List of islands of Japan, thousands of smaller islands, covering . Japan has a population of over 123 million as of 2025, making it the List of countries and dependencies by population, eleventh-most populous country. The capital of Japan and List of cities in Japan, its largest city is Tokyo; the Greater Tokyo Area is the List of largest cities, largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 Prefectures of Japan, administrative prefectures and List of regions of Japan, eight traditional regions. About three-quarters of Geography of Japan, the countr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrothermal Vent
Hydrothermal vents are fissures on the seabed from which geothermally heated water discharges. They are commonly found near volcanically active places, areas where tectonic plates are moving apart at mid-ocean ridges, ocean basins, and hotspots. The dispersal of hydrothermal fluids throughout the global ocean at active vent sites creates hydrothermal plumes. Hydrothermal deposits are rocks and mineral ore deposits formed by the action of hydrothermal vents. Hydrothermal vents exist because the Earth is both geologically active and has large amounts of water on its surface and within its crust. Under the sea, they may form features called black smokers or white smokers, which deliver a wide range of elements to the world's oceans, thus contributing to global marine biogeochemistry. Relative to the majority of the deep sea, the areas around hydrothermal vents are biologically more productive, often hosting complex communities fueled by the chemicals dissolved in the vent fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Japan
This is a list of active and extinct volcanoes in Japan. An Orange background indicates a volcano considered active by the Japan Meteorological Agency. Hokkaido Honshū Izu Islands Ogasawara Archipelago The Ogasawara Archipelago include the Bonin Islands and Volcano Islands. Kyūshū Ryūkyū Islands See also * Notes and references Notes References External links Quaternary Volcanoes of Japan- Geological Survey of Japan - Geological Survey of Japan * [http://www.data.jma.go.jp/svd/vois/data/tokyo/STOCK/souran_eng/souran.htm The National Catalogue of the Active Volcanoes in Japan] - Japan Meteorological Agency 日本の主な山岳標高 (Elevation of Principal Mountains in Japan) - Geospatial Information Authority of Japan {{Asia topic, List of volcanoes in Lists of volcanoes, Japan Volcanoes of Japan, Lists of coordinates Lists of landforms of Japan, Volcanoes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minami-Hiyoshi Seamount
The Minami-Hiyoshi Seamount is an active seamount in the Bonin Islands of Japan. Geography Located south of Tokyo and south of Iwo Jima, The main cone of the Hiyoshi complex, the Minami-Hiyoshi is a stratovolcano with a base diameter of with a height above the seabed around . The submarine volcano complex involves four submarine volcanic peaks; Kita-Hiyoshi, Naka-Hiyoshi, Minami-Hiyoshi and the Ko-Hiyoshi submarine volcanoes. This complex is geologically connected to the Izu-Mariana arc. Composition Unlike volcanoes of the south and central parts of the Mariana volcanic arc, which usually are made of low-alkali and mid-alkali tholeeite basalt, the Hiyoshi complex includes more alkaline lava with more K, Ba and Sr. Recent activity In a report about the seismic activity of the volcano compiled in 2003, the active cone, Minami-Hiyoshi was reported to have "low activity" over the period of a month in 2001. Other than that, Minami-Hiyoshi has had many periods of activity includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur
Sulfur ( American spelling and the preferred IUPAC name) or sulphur ( Commonwealth spelling) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with the chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature. Sulfur is the tenth most abundant element by mass in the universe and the fifth most common on Earth. Though sometimes found in pure, native form, sulfur on Earth usually occurs as sulfide and sulfate minerals. Being abundant in native form, sulfur was known in ancient times, being mentioned for its uses in ancient India, ancient Greece, China, and ancient Egypt. Historically and in literature sulfur is also called brimstone, which means "burning stone". Almost all elemental sulfur is produced as a byproduct of removing sulfur-containing contaminants from natural gas and petroleum.. Downloahere Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Remotely Operated Underwater Vehicle
A remotely operated underwater vehicle (ROUV) or remotely operated vehicle (ROV) is a free-swimming submersible craft used to perform underwater observation, inspection and physical tasks such as valve operations, hydraulic functions and other general tasks within the subsea oil and gas industry, military, scientific and other applications. ROVs can also carry tooling packages for undertaking specific tasks such as pull-in and connection of flexible flowlines and umbilicals, and component replacement. They are often used to do research and commercial work at great depths beyond the capacities of most submersibles and divers. Description This meaning is different from remote control vehicles operating on land or in the air because ROVs are designed specifically to function in underwater environments, where conditions such as high pressure, limited visibility, and the effects of buoyancy and water currents pose unique challenges. While land and aerial vehicles use wireless commu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USNS Melville (T-AGOR-14)
BRP ''Gregorio Velasquez'' is Philippine Navy's first oceanographic research vessel. It was built by the United States Navy as USNS ''Melville'' (T-AGOR-14) for university support of Navy programs. The ship was operated as the research vessel R/V ''Melville'' by the Scripps Institution of Oceanography for oceanographic research. As the R/V ''Melville'', it was the oldest active vessel in the academic research fleet, collectively known as the University-National Oceanographic Laboratory System (UNOLS) (UNOLS). The US Government confirmed on 17 November 2015 that the ''Melville'' was to be transferred to the Philippine Navy as Excess Defense Articles (EDA)s. The vessel was officially transferred to the Philippines on 28 April 2016 and was commissioned into active service at the same time with the Philippine Navy. Construction ''Melville'' (AGOR 14) was laid down on 12 July 1967 by the Defoe Shipbuilding Company in Bay City, Michigan, launched on 10 July 1968 sponsored by Marguerit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NOAA
The National Oceanic and Atmospheric Administration (NOAA ) is an American scientific and regulatory agency charged with forecasting weather, monitoring oceanic and atmospheric conditions, charting the seas, conducting deep-sea exploration, and managing fishing and protection of marine mammals and endangered species in the US exclusive economic zone. The agency is part of the United States Department of Commerce and is headquartered in Silver Spring, Maryland. History NOAA traces its history back to multiple agencies, some of which are among the earliest in the federal government: * United States Coast and Geodetic Survey, formed in 1807 * Weather Bureau of the United States, formed in 1870 * Bureau of Commercial Fisheries, formed in 1871 (research fleet only) * Coast and Geodetic Survey Corps, formed in 1917 The most direct predecessor of NOAA was the Environmental Science Services Administration (ESSA), into which several existing scientific agencies such as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paragiopagurus Ventilatus
''Paragiopagurus'' is a genus of hermit crabs in the family Parapaguridae The Parapaguridae are a family of marine hermit crabs from deep waters. Instead of carrying empty gastropod shells like other hermit crabs, they carry colonies of dozen or more sea anemone Sea anemones ( ) are a group of predation, predatory ..., that contains 25 species. Members of this genus live at depths from 116 to 2,067 meters. Species References Hermit crabs Terrestrial crustaceans {{Anomura-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustaceans
Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of Arthropod, arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic animal, aquatic arthropods including decapoda, decapods (shrimps, prawns, crabs, lobsters and crayfish), ostracoda, seed shrimp, branchiopoda, branchiopods, argulidae, fish lice, krill, remipedes, isopods, barnacles, copepods, Mysida, opossum shrimps, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the Hexapoda, hexapods (insects and entognathans) emerged deep in the Crustacean group, with the completed pan-group referred to as Pancrustacea. The three classes Cephalocarida, Branchiopoda and Remipedia are more closely related to the hexapods than they are to any of the other crustaceans (oligostracans and multicrustaceans). The 67,000 described spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symphurus Thermophilus
''Symphurus thermophilus'' is a species of tonguefish notable for being the only flatfish known to be an obligate inhabitant of hydrothermal vents. It is known to inhabit several widely dispersed locations in the western Pacific Ocean and occurs in great numbers. These flatfish are distinguished by the prominent dark crossbands on their brown eyed side, black abdominal cavity membrane lining known as the peritoneum, and white blind side. They are tolerant of harsh conditions and are often found in close association with chemical element, elemental sulfur, including molten sulfur pools that exceed 180 °C in temperature. As they are not significantly different in appearance and feeding habits from other tonguefishes, they are thought to be relatively recent colonizers of vent ecosystems. Taxonomy These fish were first observed in nature in 1988, and were provisionally assigned to the species ''Symphurus orientalis'' before being recognized as a new species. The species name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
