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2007 Chūetsu Offshore Earthquake
The ) was a powerful magnitude 6.6 earthquake that occurred 10:13 local time (01:13 UTC) on July 16, 2007, in the northwest Niigata region of Japan. The earthquake, which occurred at a previously unknown offshore fault shook Niigata and neighbouring prefectures. The city of Kashiwazaki and the villages of Iizuna and Kariwa registered the highest seismic intensity of a strong 6 on Japan's ''shindo'' scale, and the quake was felt as far away as Tokyo. Eleven deaths and at least 1,000 injuries were reported, and 342 buildings were completely destroyed, mostly older wooden structures. Prime Minister Shinzō Abe broke off from his election campaign to visit Kashiwazaki and promised to "make every effort towards rescue and also to restore services such as gas and electricity". Tectonic summary This magnitude 6.6 earthquake occurred approximately off the west coast of Honshū, Japan, in a zone of compressional deformation that is associated with the boundary between the Amur P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Quake July 16
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the eleventh most populous country in the world, as well as one of the most densely populated and urbanized. About three-fourths of the country's terrain is mountainous, concentrating its population of 123.2 million on narrow coastal plains. Japan is divided into 47 administrative prefectures and eight traditional regions. The Greater Tokyo Area is the most pop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amur Plate
The Amurian Plate (or Amur Plate; also occasionally referred to as the China Plate, not to be confused with the South China Subplate) is a minor tectonic plate in the northern and eastern hemispheres. It covers Manchuria, the Korean Peninsula, the Sea of Japan, Shikoku, Kyushu, southwest Honshu (Kansai, Chūgoku), eastern Mongolia and the south of Russian Far East. Once thought to be a part of the Eurasian Plate, the Amurian Plate is now generally considered to be a separate plate moving southeast with respect to the Eurasian Plate. The Amurian Plate is named after the Amur River, which forms the border between the Russian Far East and Northeastern China. It is bounded on the north, west, and southwest by the Eurasian Plate, on the east by the Okhotsk Plate, to the southeast by the Philippine Sea Plate along the Suruga Trough and the Nankai Trough, and the Okinawa Plate, and the Yangtze Plate.Yu. F. Malyshev, et al. Deep structure of the Amur lithospheric Plate border zone. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iizuna
is a town located in the Kamiminochi District of norther Nagano Prefecture, Japan. , the town had an estimated population of 11,115 in 4187 households, and a population density of 150 persons per km2. the total area of the town is . Geography Iizuna is located in northern Nagano Prefecture. It is 13.9 km from east to west and 15.6 km in the south north. The Yaja River that flows from the Mount Reisenji forms the western border of the town which is located on its river terrace. The Torii River flows through the center of town. The Madarao River flows from Shinano, and flows on the north side of this town. It joins the Chikuma River via the Nakano city in the east. Climate The village has a climate characterized by hot and humid summers, and cold winters (Köppen climate classification ''Cfa''). The average annual temperature in Iizuna is 11.3 °C. The average annual rainfall is 1254 mm with September as the wettest month. The temperatures are highest on ave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nagano Prefecture
is a landlocked prefecture of Japan located in the Chūbu region of Honshū. Nagano Prefecture has a population of 2,052,493 () and has a geographic area of . Nagano Prefecture borders Niigata Prefecture to the north, Gunma Prefecture to the northeast, Saitama Prefecture to the east, Yamanashi Prefecture to the southeast, Shizuoka Prefecture and Aichi Prefecture to the south, and Gifu Prefecture and Toyama Prefecture to the west. Nagano is the capital and largest city of Nagano Prefecture, with other major cities including Matsumoto, Ueda, and Iida. Nagano Prefecture has impressive highland areas of the Japanese Alps, including most of the Hida Mountains, Kiso Mountains, and Akaishi Mountains which extend into the neighbouring prefectures. The abundance of mountain ranges, natural scenic beauty, and rich history has gained Nagano Prefecture international recognition as a world-class winter sports tourist destination, including hosting the 1998 Winter Olympics and a new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kariwa
is a village located in Niigata Prefecture, Japan. , the village had an estimated population of 4,578 in 1613 households, and a population density of 174 persons per km². The total area of the village was . Geography Kariwa is located in central Niigata Prefecture, sandwiched between the cities of Nagaoka and Kashiwazaki, and consists of two discontinuous areas. Kariwa is located near the Sea of Japan but has no coastline. It takes over 3 hours to reach Tokyo by train (using local trains and Jōetsu Shinkansen from Nagaoka), or by car on the Kan-Etsu Expressway. Surrounding municipalities *Niigata Prefecture ** Kashiwazaki ** Nagaoka Demographics Per Japanese census data, the population of Kariwa peaked at around the year 1990, and has declined steadily since. History The area of present-day Kariwa was part of ancient Echigo Province and was part of the ''tenryō'' holdings of the Tokugawa shogunate during the Edo period. The village of Kariwa was established within Kariwa D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nagaoka, Niigata
is a Cities of Japan, city located in Niigata Prefecture, Japan. It is the second largest city in the prefecture, after the capital city of Niigata, Niigata, Niigata. , the city had an estimated population of 264,611 in 109,283 households and a population density of . The total area of the city was . Geography Nagaoka is in the center of Niigata prefecture and the surrounding Chūetsu region of Japan, between 138th meridian east, longitude 138°E and 37th parallel north, latitude 37°N. It is 80 minutes from Tokyo by way of the Joetsu Shinkansen or three hours on the Kan-Etsu Expressway and is considered a strategic traffic point in the region. Nagaoka was an inland city until January 1, 2006, when the city merged with four municipalities; two were touching the Sea of Japan. The Shinano River flows through the city from south to north and industrial development is on both banks of the river. The Higashiyama mountain range lies to the east. Surrounding municipalities * Niigata P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JMA Seismic Intensity
The Japan Meteorological Agency (JMA) Seismic Intensity Scale (known in Japan as the Shindo seismic scale) is a seismic intensity scale used in Japan to categorize the intensity of local ground shaking caused by earthquakes. The JMA intensity scale should not be confused or conflated with magnitude measurements like the moment magnitude (Mw) and the earlier Richter scales, which represent how much energy an earthquake releases. Much like the Mercalli scale, the JMA scheme quantifies how much ground-surface shaking takes place ''at measurement sites distributed throughout an affected area''. Intensities are expressed as numerical values called ; the higher the value, the more intense the shaking. Values are derived from peak ground acceleration and duration of the shaking, which are themselves influenced by factors such as distance to and depth of the hypocenter (focus), local soil conditions, and nature of the geology in between, as well as the event's magnitude; every qua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Izumozaki, Niigata
is a town located in Niigata Prefecture, Japan. , the town had an estimated population of 4,190, and a population density of 94.4 persons per km². The total area of the town was . Geography Izumozaki is located in a coastal region of central Niigata Prefecture bordered by the Sea of Japan to the west. Surrounding municipalities *Niigata Prefecture ** Nagaoka ** Kashiwazaki Climate Izumozaki has a humid climate (Köppen ''Cfa'') characterized by warm, wet summers and cold winters with heavy snowfall. The average annual temperature in Izumozaki is 12.6 °C. The average annual rainfall is 2261 mm with September as the wettest month. The temperatures are highest on average in August, at around 25.7 °C, and lowest in January, at around 0.7 °C. Demographics Per Japanese census data, the population of Izumozaki has declined steadily over the past 50 years. History The area of present-day Izumozaki was part of ancient Echigo Province. During the Edo period, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gal (unit)
The gal (symbol: Gal), sometimes called galileo after Galileo Galilei, is a unit of acceleration sometimes used in gravimetry. BIPM ''SI brochure'', 8th ed. 2006Table 9: Non-SI units associated with the CGS and the CGS-Gaussian system of units. The gal is defined as 1 centimeter per second squared (1 cm/s2). The milligal (mGal) and microgal (µGal) are respectively one thousandth and one millionth of a gal. The gal is not part of the International System of Units (known by its French-language initials "SI"). In 1978 the CIPM decided that it was permissible to use the gal "with the SI until the CIPM considers that tsuse is no longer necessary". However, use of the gal is deprecated by ISO 80000-3:2006. The gal is a derived unit, defined in terms of the centimeter–gram–second (CGS) base unit of length, the centimeter, and the second, which is the base unit of time in both the CGS and the modern SI system. In SI base units, 1 Gal is equal to 0.01 m/s2. The a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake Rupture
In seismology, an earthquake rupture is the extent of slip that occurs during an earthquake in the Earth's crust. Earthquakes occur for many reasons that include: landslides, movement of magma in a volcano, the formation of a new fault, or, most commonly of all, a slip on an existing fault. Nucleation A tectonic earthquake begins by an initial rupture at a point on the fault surface, a process known as nucleation. The scale of the nucleation zone is uncertain, with some evidence, such as the rupture dimensions of the smallest earthquakes, suggesting that it is smaller than 100 m while other evidence, such as a slow component revealed by low-frequency spectra of some earthquakes, suggest that it is larger. The possibility that the nucleation involves some sort of preparation process is supported by the observation that about 40% of earthquakes are preceded by foreshocks. However, some large earthquakes, such as the M8.6 1950 India - China earthquake., have no foreshocks and it re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Of Japan
The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific Ocean. This isolation also affects faunal diversity and salinity, both of which are lower than in the open ocean. The sea has no large islands, bays or capes. Its water balance is mostly determined by the inflow and outflow through the straits connecting it to the neighboring seas and the Pacific Ocean. Few rivers discharge into the sea and their total contribution to the water exchange is within 1%. The seawater has an elevated concentration of dissolved oxygen that results in high biological productivity. Therefore, fishing is the dominant economic activity in the region. The intensity of shipments across the sea has been moderate owing to political issues, but it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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