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Matsushiro Earthquake Swarm
The Matsushiro earthquake swarm () was an earthquake swarm that occurred near Matsushiro, a suburb of Nagano, to the northwest of Tokyo in 1965. The event is one of the best ever documented earthquake swarms. Overview The Matsushiro swarm lasted from 1965 to 1967 and generated about 1 million earthquakes. The total sum of energy from all the tremors was approximately equivalent to an M6.4 earthquake. This swarm had the peculiarity to be sited just under a seismological observatory installed in 1947 in a decommissioned military tunnel. It began in August 1965 with three earthquakes too weak to be felt, but three months later, a hundred earthquakes could be felt daily. On 17 April 1966, the observatory recorded 6,780 earthquakes, with 585 of them having a magnitude large enough to be felt, which meant that one earthquake could be felt every 2 minutes 30 seconds the average. The phenomenon was clearly identified as linked to a magma Magma () is the molten or semi-molten natura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matsushiro Earthquake Swarm
The Matsushiro earthquake swarm () was an earthquake swarm that occurred near Matsushiro, a suburb of Nagano, to the northwest of Tokyo in 1965. The event is one of the best ever documented earthquake swarms. Overview The Matsushiro swarm lasted from 1965 to 1967 and generated about 1 million earthquakes. The total sum of energy from all the tremors was approximately equivalent to an M6.4 earthquake. This swarm had the peculiarity to be sited just under a seismological observatory installed in 1947 in a decommissioned military tunnel. It began in August 1965 with three earthquakes too weak to be felt, but three months later, a hundred earthquakes could be felt daily. On 17 April 1966, the observatory recorded 6,780 earthquakes, with 585 of them having a magnitude large enough to be felt, which meant that one earthquake could be felt every 2 minutes 30 seconds the average. The phenomenon was clearly identified as linked to a magma Magma () is the molten or semi-molten natura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake Swarm
In seismology, an earthquake swarm is a sequence of seismic events occurring in a local area within a relatively short period. The time span used to define a swarm varies, but may be days, months, or years. Such an energy release is different from the situation when a major earthquake (main shock) is followed by a series of aftershocks: in earthquake swarms, no single earthquake in the sequence is obviously the main shock. In particular, a cluster of aftershocks occurring after a mainshock ''is not'' a swarm. History and generalities In the Ore Mountains (Erzgebirge), which form the border between the Czech Republic and Germany, western Bohemia and the Vogtland region, have been known since the 16th century as prone to frequent earthquake swarms, which typically last a few weeks to a few months. Austrian geologist Josef Knett, while studying in 1899 a swarm of about a hundred events felt in western Bohemia/Vogtland in January-February 1824, coined the noun ''Schwarmbeben'', ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matsushiro, Nagano
Matsushiro () was a historically important town in Hanishina District, Nagano Prefecture, Japan. In 1966, it was incorporated into Nagano City. In general Matsushiro was a thriving town as the center of Matsushiro Domain under the Sanada clan_during_the_Edo_period.html" ;"title="DF 56 of 80/nowiki>">DF 56 of 80">("Sa ... during the Edo period">DF 56 of 80/nowiki>">DF 56 of 80">("Sa ... during the Edo period of the 17th to 19th centuries. In the Meiji period of the latter half of the 19th century, there was a thriving silk industry there and the area was known for its Matsushiro ware. During the last days of World War II, Matsushiro Underground Imperial Headquarters was built in the caves of the near-by mountain. In 1966, Matsushiro was incorporated into Nagano, Nagano, Nagano City, and remains as Matsushiro-machi, Nagano City. Matsushiro is now famous as a thriving sightseeing area. Transportation About three kilometers south on Prefectural Road 35 ( 長野県道35号長野 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nagano (city)
is the capital and largest city of Nagano Prefecture, located in the Nagano Basin (Zenkoji Daira) in the central Chūbu region of Japan. Nagano is categorized as a core city of Japan. Nagano City is the highest prefectural capital in Japan, with an altitude of . The city is surrounded by mountains, the highest of which is Mount Takatsuma (2,353m), and is near the confluence of the Chikuma River - the longest and widest river in Japan - and the Sai River. , the city had an estimated population of 370,632 in 160,625 households, and a population density of 444 persons per km2. The total area of the city is . Overview Nagano City, located in the former Shinano Province, developed from the Nara period (AD 710 to 794) as a temple town (''monzen machi''). The city of Nagano is home to Zenkō-ji, a 7th-century Buddhist temple that is listed as a Japanese national treasure. Zenkō-ji was established in its current location in 642 AD. The location of Zenkō-ji is approximately 2 kilometer ... [...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 devastate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake Swarms
In seismology, an earthquake swarm is a sequence of seismic events occurring in a local area within a relatively short period. The time span used to define a swarm varies, but may be days, months, or years. Such an energy release is different from the situation when a major earthquake (main shock) is followed by a series of aftershocks: in earthquake swarms, no single earthquake in the sequence is obviously the main shock. In particular, a cluster of aftershocks occurring after a mainshock ''is not'' a swarm. History and generalities In the Ore Mountains (Erzgebirge), which form the border between the Czech Republic and Germany, western Bohemia and the Vogtland region, have been known since the 16th century as prone to frequent earthquake swarms, which typically last a few weeks to a few months. Austrian geologist Josef Knett, while studying in 1899 a swarm of about a hundred events felt in western Bohemia/Vogtland in January-February 1824, coined the noun ''Schwarmbeben'', ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma
Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natural satellites. Besides molten rock, magma may also contain suspended crystals and gas bubbles. Magma is produced by melting of the mantle or the crust in various tectonic settings, which on Earth include subduction zones, continental rift zones, mid-ocean ridges and hotspots. Mantle and crustal melts migrate upwards through the crust where they are thought to be stored in magma chambers or trans-crustal crystal-rich mush zones. During magma's storage in the crust, its composition may be modified by fractional crystallization, contamination with crustal melts, magma mixing, and degassing. Following its ascent through the crust, magma may feed a volcano and be extruded as lava, or it may solidify underground to form an intrusion, such as a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1964 Niigata Earthquake
Events January * January 1 – The Federation of Rhodesia and Nyasaland is dissolved. * January 5 - In the first meeting between leaders of the Roman Catholic and Orthodox churches since the fifteenth century, Pope Paul VI and Patriarch Athenagoras I of Constantinople meet in Jerusalem. * January 6 – A British firm, the Leyland Motor Corp., announces the sale of 450 buses to the Cuban government, challenging the United States blockade of Cuba. * January 9 – ''Martyrs' Day'': Armed clashes between United States troops and Panamanian civilians in the Panama Canal Zone precipitate a major international crisis, resulting in the deaths of 21 Panamanians and 4 U.S. soldiers. * January 11 – United States Surgeon General Luther Terry reports that smoking may be hazardous to one's health (the first such statement from the U.S. government). * January 12 ** Zanzibar Revolution: The predominantly Arab government of Zanzibar is overthrown by African nationalist rebels; a Un ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1965 Earthquakes
Events January–February * January 14 – The Prime Minister of Northern Ireland and the Taoiseach of the Republic of Ireland meet for the first time in 43 years. * January 20 ** Lyndon B. Johnson is Second inauguration of Lyndon B. Johnson, sworn in for a full term as President of the United States. ** Indonesian President Sukarno announces the withdrawal of the Indonesian government from the United Nations. * January 30 – The Death and state funeral of Winston Churchill, state funeral of Sir Winston Churchill takes place in London with the largest assembly of dignitaries in the world until the 2005 funeral of Pope John Paul II. * February 4 – Trofim Lysenko is removed from his post as director of the Institute of Genetics at the Russian Academy of Sciences, Academy of Sciences in the Soviet Union. Lysenkoism, Lysenkoist theories are now treated as pseudoscience. * February 12 ** The African and Malagasy Republic, Malagasy Common Organization ('; OCA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1966 Earthquakes
Events January * January 1 – In a coup, Colonel Jean-Bédel Bokassa takes over as military ruler of the Central African Republic, ousting President David Dacko. * January 3 – 1966 Upper Voltan coup d'état: President Maurice Yaméogo is deposed by a military coup in the Republic of Upper Volta (modern-day Burkina Faso). * January 10 ** Pakistani–Indian peace negotiations end successfully with the signing of the Tashkent Declaration, a day before the sudden death of Indian prime minister Lal Bahadur Shastri. ** The House of Representatives of the US state of Georgia refuses to allow African-American representative Julian Bond to take his seat, because of his anti-war stance. ** A Commonwealth Prime Ministers' Conference convenes in Lagos, Nigeria, primarily to discuss Rhodesia. * January 12 – United States President Lyndon Johnson states that the United States should stay in South Vietnam until Communist aggression there is ended. * January 15 – 1966 Nigeria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1967 Earthquakes
Events January * January 1 – Canada begins a year-long celebration of the 100th anniversary of Canadian Confederation, Confederation, featuring the Expo 67 World's Fair. * January 5 ** Spain and Romania sign an agreement in Paris, establishing full consular and commercial relations (not diplomatic ones). ** Charlie Chaplin launches his last film, ''A Countess from Hong Kong'', in the UK. * January 6 – Vietnam War: United States Marine Corps, USMC and Army of the Republic of Vietnam, ARVN troops launch ''Operation Deckhouse Five'' in the Mekong Delta. * January 8 – Vietnam War: Operation Cedar Falls starts. * January 13 – A military coup occurs in Togo under the leadership of Étienne Eyadema. * January 14 – The Human Be-In takes place in Golden Gate Park, San Francisco; the event sets the stage for the Summer of Love. * January 15 ** Louis Leakey announces the discovery of pre-human fossils in Kenya; he names the species ''Proconsul nyanzae, Kenyapithecus africanus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1965 In Japan
Events from the year 1965 in Japan. Incumbents *Emperor: Hirohito *Prime Minister: Eisaku Satō (Liberal Democratic) * Chief Cabinet Secretary: Tomisaburo Hashimoto *Chief Justice of the Supreme Court: Kisaburo Yokota *President of the House of Representatives: Naka Funada until December 20, Kikuchirō Yamaguchi *President of the House of Councillors: Yūzō Shigemune Governors *Aichi Prefecture: Mikine Kuwahara *Akita Prefecture: Yūjirō Obata *Aomori Prefecture: Shunkichi Takeuchi *Chiba Prefecture: Taketo Tomonō *Ehime Prefecture: Sadatake Hisamatsu *Fukui Prefecture: Eizō Kita *Fukuoka Prefecture: Taichi Uzaki *Fukushima Prefecture: Morie Kimura *Gifu Prefecture: Yukiyasu Matsuno *Gunma Prefecture: Konroku Kanda *Hiroshima Prefecture: Iduo Nagano *Hokkaido: Kingo Machimura *Hyogo Prefecture: Motohiko Kanai *Ibaraki Prefecture: Nirō Iwakami *List of governors of Ishikawa Prefecture, Ishikawa Prefecture: Yōichi Nakanishi *Iwate Prefecture: Tadashi Chida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
