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Bayonnaise Rocks
is a group of volcanic rocks in the Philippine Sea about south of Tokyo and south-southeast of Aogashima, in the south portion of the Izu archipelago, Japan. The rocks were discovered by the French corvette ''Bayonnaise'' in 1850, while surveying the islands south of Tokyo Bay. Geography The rocks are the exposed portion of the western ridge of a submarine volcanic caldera, approximately in diameter at a depth of approximately .Christopher G. Newhall, Daniel Dzurisin: ''Historical Unrest at large Calderas of the World.'' Volume 1, U.S. Geological Survey Bulletin 1855, Washington 1988, p. 506Bathymetric map around "Bayonnaise Rocks" based on Basic Map of the Sea(1:50.000, retrieved 2012-12-13). The above sea-level portion has a surface area of approximately 0.01 square kilometers, with a summit height of . and consists of three large rocks and many smaller rocks. The caldera is known to have erupted in 1869–1871, 1896, 1906, 1915, 1934, 1946, 1952–1955, 1957–1960, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prefectures Of Japan
Japan is divided into 47 prefectures (, ''todōfuken'', ), which rank immediately below the national government and form the country's first level of jurisdiction and administrative division. They include 43 prefectures proper (, '' ken''), two urban prefectures (, '' fu'': Osaka and Kyoto), one " circuit" or "territory" (, ''dō'': Hokkai-dō) and one metropolis (, '' to'': Tokyo). In 1868, the Meiji '' Fuhanken sanchisei'' administration created the first prefectures (urban ''fu'' and rural ''ken'') to replace the urban and rural administrators ('' bugyō'', '' daikan'', etc.) in the parts of the country previously controlled directly by the shogunate and a few territories of rebels/shogunate loyalists who had not submitted to the new government such as Aizu/ Wakamatsu. In 1871, all remaining feudal domains ''( han)'' were also transformed into prefectures, so that prefectures subdivided the whole country. In several waves of territorial consolidation, today's 47 prefe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is gone. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at Kīlauea, Hawaii in 2018. Etymology The term ''caldera'' comes from Spanish ', and Latin ', meaning "coo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uninhabited Islands Of Japan
The list of uninhabited regions includes a number of places around the globe. The list changes year over year as human beings migrate into formerly uninhabited regions, or migrate out of formerly inhabited regions. List As a group, the list of uninhabited places are called the "nonecumene". This is a special geography term which means the uninhabited area of the world. * Virtually all of the Ocean *Virtually all of Antarctica *Most of The Arctic *Most of Greenland *Most of The Sahara * Antipodes Islands * Ashmore and Cartier Islands * Bajo Nuevo Bank * Baker Island * Ball's Pyramid * Balleny Islands * Big Major Cay * Bouvet Island * Much of the interior of Brazil * Caroline Island * Clipperton Island * The semi-arid regions and deserts of Australia * Devon Island * Much of Eastern Oregon * Elephant Island * Elobey Chico * Ernst Thälmann Island * Much of Fiordland, New Zealand * Goa Island * Gough Island * Hans Island * Harmil * Hashima Island * Hatutu * Heard Is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Islands In Japan
Japan is an archipelago of 6,852 islands, of which approximately 260 are inhabited. Japan is the largest island country in East Asia and the fourth largest in the world. Main islands The four ''main islands'' of Japan are:Imperial Japanese Commission to the Louisiana Purchase Exposition. (1903)''Japan in the Beginning of the 20th century'' (Haruki Yamawaki, editor), p. 2 *Hokkaido - the northernmost and second largest main island. *Honshu - the largest and most populous island with the capital Tokyo. *Kyushu - the third largest main island and nearest to the Asian continent. *Shikoku - the smallest main island, it is between Honshu and Kyushu. Hokkaido prefecture * Ōshima * Okushiri Island * Teuri Island * Rebun Island * Rishiri Island * Yagishiri Island *Kamome island Islands of Honshu in the Sea of Japan * Awashima Island, Niigata * Kanmurijima * Kutsujima, Kyoto * Mitsukejima * Nanatsujima archipelago * Notojima * Oki Islands (Oki Islands) Ponsonby-Fane, Ric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Islands
This is a list of the lists of islands in the world grouped by country A country is a distinct part of the world, such as a state, nation, or other political entity. It may be a sovereign state or make up one part of a larger state. For example, the country of Japan is an independent, sovereign state, whi ..., by continent, by body of water, and by other classifications. For rank-order lists, see the other lists of islands below. Lists of islands by country Africa Antarctica Asia Europe North America Oceania South America Lists of islands by continent Lists of islands by body of water By ocean: By other bodies of water: List of ancient islands Other lists of islands External links Island Superlatives {{DEFAULTSORT:List Of Islands * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desert Island
A desert island, deserted island, or uninhabited island, is an island, islet or atoll that is not permanently populated by humans. Uninhabited islands are often depicted in films or stories about shipwrecked people, and are also used as stereotypes for the idea of " paradise". Some uninhabited islands are protected as nature reserves, and some are privately owned. Devon Island in Canada's far north is the largest uninhabited island in the world. Small coral atolls or islands usually have no source of fresh water, but occasionally a freshwater lens can be reached with a well. Terminology Uninhabited islands are sometimes also called "deserted islands" or "desert islands". In the latter, the adjective '' desert'' connotes not desert climate conditions, but rather "desolate and sparsely occupied or unoccupied". The word ''desert'' has been "formerly applied more widely to any wild, uninhabited region, including forest-land", and it is this archaic meaning that appears in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kuroshio Current
The , also known as the Black or or the is a north-flowing, warm ocean current on the west side of the North Pacific Ocean basin. It was named for the deep blue appearance of its waters. Similar to the Gulf Stream in the North Atlantic, the Kuroshio is a powerful western boundary current that transports warm equatorial water poleward and forms the western limb of the North Pacific Subtropical Gyre. Off the East Coast of Japan, it merges with the Oyashio Current to form the North Pacific Current. The Kuroshio Current has significant effects on both physical and biological processes of the North Pacific Ocean, including nutrient and sediment transport, major pacific storm tracks and regional climate, and Pacific mode water formation.Terazaki, Makoto (1989) "Recent Large-Scale Changes in the Biomass of the Kuroshio Current Ecosystem" in Kenneth Sherman and Lewis M. Alexander (eds.), Biomass Yields and Geography of Large Marine Ecosystems (Boulder: Westview) AAAS Selected Sympos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Migratory Bird
Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. Migration carries high costs in predation and mortality, including from hunting by humans, and is driven primarily by the availability of food. It occurs mainly in the northern hemisphere, where birds are funneled onto specific routes by natural barriers such as the Mediterranean Sea or the Caribbean Sea. Migration of species such as storks, turtle doves, and swallows was recorded as many as 3,000 years ago by Ancient Greek authors, including Homer and Aristotle, and in the Book of Job. More recently, Johannes Leche began recording dates of arrivals of spring migrants in Finland in 1749, and modern scientific studies have used techniques including bird ringing and satellite tracking to trace migrants. Threats to migratory birds have grown with habitat destruction, especially of stopover and wintering sites, as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myōjin-shō
is a submarine volcano located about 450 kilometers south of Tokyo on the Izu-Ogasawara Ridge in the Izu Islands. Volcanic activity has been detected there since 1869. Since then it has undergone more eruptions, the most powerful of which resulted in the appearance and disappearance of a small island. The name Myōjin-shō derives from a fishing boat, ''No.11 Myōjin-Maru'' of Yaizu City, Shizuoka Prefecture, the crew of which first witnessed the major volcanic eruption of 1952. Eruption of 1952-1953 The volcanic eruption from 1952 to 1953 was one of its biggest eruptions on record, with the repetitious appearance and disappearance of an island, which at one point reached over ten metres above sea level, before sinking after a major volcanic eruption in September 1953. On September 24, 1952, a survey vessel, ''Kaiyo Maru No. 5'' of the Hydrographic Department of the Maritime Safety Agency, was destroyed by the volcano, with the loss of its crew of 31 (including the nine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine Eruption
Submarine eruptions are those volcano eruptions which take place beneath the surface of water. These occur at constructive margins, subduction zones and within tectonic plates due to hotspots. This eruption style is far more prevalent than subaerial activity. For example, it is believed that 70 to 80% of the Earth's magma output takes place at mid-ocean ridges.Parfitt, L. and Wilson, L. (2008) ''Fundamentals of Physical Volcanology'', Blackwell Publishing. Detection Submarine eruptions are less studied than subaerial volcanoes due to their inaccessibility. Developments in technology mean that submarine volcanoes can now be studied in greater detail. Despite this progress, understanding is still limited. Mid ocean ridges for example are the most active volcanic systems on Earth but roughly only 5% of their length has been studied in detail.Fagents, S.A., Gregg, T.K.P. and Lopes, R.M.C. (2013) ''Modelling Volcanic processes: the Physics and Mathematics of Volcanism'', Cambridge U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokyo Bay
is a bay located in the southern Kantō region of Japan, and spans the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel. The Tokyo Bay region is both the most populous and largest industrialized area in Japan. Names In ancient times, Japanese knew Tokyo Bay as the . By the Azuchi–Momoyama period (1568–1600) the area had become known as after the city of Edo. The bay took its present name in modern times, after the Imperial court moved to Edo and renamed the city Tokyo in 1868. Geography Tokyo Bay juts prominently into the Kantō Plain. It is surrounded by the Bōsō Peninsula in Chiba Prefecture to the east and the Miura Peninsula in Kanagawa Prefecture to the west. The shore of Tokyo Bay consists of a diluvial plateau and is subject to rapid marine erosion. Sediments on the shore of the bay make for a smooth, continuous shoreline. Boundaries In a narrow sense, Tokyo Bay is the area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokyo
Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.468 million residents ; the city proper has a population of 13.99 million people. Located at the head of Tokyo Bay, the prefecture forms part of the Kantō region on the central coast of Honshu, Japan's largest island. Tokyo serves as Japan's economic center and is the seat of both the Japanese government and the Emperor of Japan. Originally a fishing village named Edo, the city became politically prominent in 1603, when it became the seat of the Tokugawa shogunate. By the mid-18th century, Edo was one of the most populous cities in the world with a population of over one million people. Following the Meiji Restoration of 1868, the imperial capital in Kyoto was moved to Edo, which was renamed "Tokyo" (). Tokyo was dev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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