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Miyakejima
is an inhabited Volcano, volcanic island in the Izu Islands, Izu archipelago in the Philippine Sea approximately southeast of Tokyo, Japan. As with the other islands in the Izu Island group, Miyake-jima forms part of the Fuji-Hakone-Izu National Park. Etymology There are many theories about the origin of Miyake-jima's name. One theory claims a manuscript about the island's genesis called the :ja:%E4%B8%89%E5%AE%85%E8%A8%98, ''Miyakeki'' (三宅記), written by a Shinto priest from the island, influenced the name. The manuscript explains how a deity, ''Mashima (三嶋)'', constructed his palace on the island after having built two other houses on neighbouring islands. Each of the houses had their backs facing the palace, thus giving a lined up impression. This belief is known as the 'three house theory'. Another hypothesis says that the shrines on Miyake-jima are historically related to those on Itsukushima, Miyajima, an island in Hiroshima Bay. As there are many more speculati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miyake Subprefecture
is a subprefecture of Tokyo Metropolis, Japan. The organization belongs to the Tokyo Metropolitan Government Bureau Of General Affairs. It includes the following villages on the Izu Islands: * Miyake (village on Miyakejima) *Mikurajima (village on Mikurajima) Its area is 76.08 square km and 3184 people. Because of the eruptions of the main 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 ..., Miyakejima was completely evacuated from September 2000. After a four-year period of volcanic emissions, residents were allowed to return permanently on February 1, 2005. History *1920: The island halls of Miyakejima and Mikurajima were abolished. Ōshima Island Government Office took control of the islands. The branch office was founded on Miyakejima. *1926: Changed to Ōshima Su ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Izu Islands
The are a group of volcanic islands stretching south and east from the Izu Peninsula of Honshū, Japan. Administratively, they form two towns and six villages; all part of Tokyo Prefecture. The largest is Izu Ōshima, usually called simply Ōshima. Although usually called the "Seven Islands of Izu" ( 伊豆七島 in Japanese), there are in fact more than a dozen islands and islets. Nine among them are currently inhabited. Geography The Izu islands stretch south-east from the Izu Peninsula on Honshu and cover an area of approximately . There are nine populated islands with a total population of 24,645 people () spread over . The largest of them is Izu Oshima (8,346 inhabitants, ), the smallest Toshima (292 inhabitants, .) Of the inhabited islands, seven are traditionally referred to as the "Izu Seven": Oshima, Toshima, Niijima, Kozujima, Miyakejima, Hachijojima, and Mikurajima, though Shikinejima and Aogashima are sometimes included as well. Each of the islands has its uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miyake, Tokyo
is a village located in Miyake Subprefecture, Tokyo Metropolis, Japan. , the village had an estimated population of 2,415, and a population density of 44.3 persons per km2. Its total area is . Geography Miyake Village covers the island of Miyakejima, in the Izu archipelago in the Philippine Sea and the nearby uninhabited Ōnohara Islands, south of central Tokyo. Neighboring municipalities *Tokyo Metropolis ** Hachijō, Tokyo ** Kōzushima, Tokyo History It is uncertain when human settlement first began on Miyakejima, but the island was known to be inhabited since at least in the early Nara period, and is mentioned in historical records for its many volcanic eruptions. The island was used as a penal colony during the Edo period. After the start of the Meiji period, in 1878, the island came under the control of Tokyo-fu and was organized into five villages (Izu, Kamitsuki, Igaya, Ako and Tsubota) under Oshima subprefecture on October 1, 1923. Miyake subprefecture was created ... [...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 List of cities in Japan, 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 Economy of Japan, Japan's economic center and is the seat of both the Government of Japan, 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 mov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfur Dioxide
Sulfur dioxide ( IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula . It is a toxic gas responsible for the odor of burnt matches. It is released naturally by volcanic activity and is produced as a by-product of copper extraction and the burning of sulfur- bearing fossil fuels. Structure and bonding SO2 is a bent molecule with ''C''2v symmetry point group. A valence bond theory approach considering just ''s'' and ''p'' orbitals would describe the bonding in terms of resonance between two resonance structures. The sulfur–oxygen bond has a bond order of 1.5. There is support for this simple approach that does not invoke ''d'' orbital participation. In terms of electron-counting formalism, the sulfur atom has an oxidation state of +4 and a formal charge of +1. Occurrence Sulfur dioxide is found on Earth and exists in very small concentrations and in the atmosphere at about 1 ppm. On other p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gas Mask
A gas mask is a mask used to protect the wearer from inhaling airborne pollutants and toxic gases. The mask forms a sealed cover over the nose and mouth, but may also cover the eyes and other vulnerable soft tissues of the face. Most gas masks are also respirators, though the word ''gas mask'' is often used to refer to military equipment (such as a field protective mask), the scope used in this article. The gas mask only protects the user from digesting, inhaling, and contact through the eyes (many agents affect through eye contact). Most combined gas mask filters will last around 8 hours in a biological or chemical situation. Filters against specific chemical agents can last up to 20 hours. Airborne toxic materials may be gaseous (for example, chlorine or mustard gas), or particulates (such as biological agents). Many filters provide protection from both types. The first gas masks mostly used circular lenses made of glass, mica or cellulose acetate to allow vision. Glass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prediction Of Volcanic Activity
Prediction of volcanic activity, or volcanic eruption forecasting, is an interdisciplinary monitoring and research effort to predict the time and severity of a volcano's eruption. Of particular importance is the prediction of hazardous eruptions that could lead to catastrophic loss of life, property, and disruption of human activities. Seismic waves (seismicity) General principles of volcano seismology * Seismic activity (earthquakes and tremors) always occurs as volcanoes awaken and prepare to erupt and are a very important link to eruptions. Some volcanoes normally have continuing low-level seismic activity, but an increase may signal a greater likelihood of an eruption. The types of earthquakes that occur and where they start and end are also key signs. Volcanic seismicity has three major forms: short-period earthquake, long-period earthquake, and harmonic tremor. * Short-period earthquakes are like normal fault-generated earthquakes. They are caused by the fracturing of bri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippine Sea
The Philippine Sea is a marginal sea of the Western Pacific Ocean east of the Philippine archipelago (hence the name), the largest in the world, occupying an estimated surface area of . The Philippine Sea Plate forms the floor of the sea. Its western border is the first island chain to the west, comprising the Ryukyu Islands in the northwest and Taiwan in the west. Its southwestern border comprises the Philippines, Philippine islands of Luzon, Catanduanes, Samar, Leyte, and Mindanao. Its northern border comprises the Japanese islands of Honshu, Shikoku and Kyūshū. Its eastern border is the second island chain to the east, comprising the Bonin Islands and Iwo Jima in the northeast, the Mariana Islands (including Guam, Saipan, and Tinian) in the due east, and Halmahera, Palau, Yap and Ulithi (of the Caroline Islands) in the southeast. Its southern border is Indonesia's Morotai Island. The sea has a complex and diverse undersea Bathymetry, relief. The floor is formed into a stru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torii
A is a traditional Japanese gate most commonly found at the entrance of or within a Shinto shrine, where it symbolically marks the transition from the mundane to the sacred. The presence of a ''torii'' at the entrance is usually the simplest way to identify Shinto shrines, and a small ''torii'' icon represents them on Japanese road maps. The first appearance of ''torii'' gates in Japan can be reliably pinpointed to at least the mid-Heian period; they are mentioned in a text written in 922. The oldest existing stone ''torii'' was built in the 12th century and belongs to a Hachiman shrine in Yamagata Prefecture. The oldest existing wooden ''torii'' is a ''ryōbu torii'' (see description below) at Kubō Hachiman Shrine in Yamanashi Prefecture built in 1535. ''Torii'' gates were traditionally made from wood or stone, but today they can be also made of reinforced concrete, copper, stainless steel or other materials. They are usually either unpainted or painted vermilion with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humid Subtropical Climate
A humid subtropical climate is a zone of climate characterized by hot and humid summers, and cool to mild winters. These climates normally lie on the southeast side of all continents (except Antarctica), generally between latitudes 25° and 40° and are located poleward from adjacent tropical climates. It is also known as warm temperate climate in some climate classifications. Under the Köppen climate classification, ''Cfa'' and ''Cwa'' climates are either described as humid subtropical climates or warm temperate climates. This climate features mean temperature in the coldest month between (or ) and and mean temperature in the warmest month or higher. However, while some climatologists have opted to describe this climate type as a "humid subtropical climate", Köppen himself never used this term. The humid subtropical climate classification was officially created under the Trewartha climate classification. In this classification, climates are termed humid subtropical when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
