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1891 Mino–Owari Earthquake
The struck the Japanese provinces of Mino and Owari (present-day Gifu Prefecture) in the Nōbi Plain in the early morning of October 28 with a surface wave magnitude of 8.0 and moment magnitude of 7.5. The event, also referred to as the , the , or the , is the largest known inland earthquake to have occurred in the Japanese archipelago. The earthquake came at a time when Japan was undergoing a transformation into a more industrial nation and while advancing its scientific understanding in many fields. Damage from the event was widespread and the loss of life was significant. The many kilometers of visible fault breaks on the surface of the earth presented scientists with opportunities for field investigations that ultimately led to an improved understanding of the fault scarps that earthquakes often generate. Preface Records of historical earthquakes and tsunami extend further back in time in Japan than any other country that lies along the Pacific Rim (the first documente ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geologic maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone of crushed rock along a single fault. Prolonged motion along closely spaced faults can blur the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1700 Cascadia Earthquake
The 1700 Cascadia earthquake occurred along the Cascadia subduction zone on January 26, 1700, with an estimated moment magnitude of 8.7–9.2. The megathrust earthquake involved the Juan de Fuca Plate from mid-Vancouver Island, south along the Pacific Northwest coast as far as northern California. The length of the fault rupture was about , with an average slip of . The earthquake caused a tsunami which struck the west coast of North America and the coast of Japan. Japanese tsunami records, along with reconstructions of the wave moving across the ocean, put the earthquake at about 9pm on the evening of 26 January 1700. Evidence The earthquake took place at about 21:00 Pacific Time on January 26, 1700 ( NS). Although there are no written records for the region from the time, the timing of the earthquake has been inferred from Japanese records of a tsunami that does not correlate with any other Pacific Rim quake. The Japanese records exist primarily in the modern-day Iwate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aftershock
In seismology, an aftershock is a smaller earthquake that follows a larger earthquake, in the same area of the main shock, caused as the displaced crust adjusts to the effects of the main shock. Large earthquakes can have hundreds to thousands of instrumentally detectable aftershocks, which steadily decrease in magnitude and frequency according to a consistent pattern. In some earthquakes the main rupture happens in two or more steps, resulting in multiple main shocks. These are known as doublet earthquakes, and in general can be distinguished from aftershocks in having similar magnitudes and nearly identical seismic waveforms. Distribution of aftershocks Most aftershocks are located over the full area of fault rupture and either occur along the fault plane itself or along other faults within the volume affected by the strain associated with the main shock. Typically, aftershocks are found up to a distance equal to the rupture length away from the fault plane. The pattern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fusakichi Omori
was a pioneer Japanese seismologist, second chairman of seismology at the Imperial University of Tokyo and president of the Japanese Imperial Earthquake Investigation Committee. Omori is also known for his observation describing the aftershock rate of earthquakes, now known as Omori's law. Education Omori studied physics with the initial British foreign advisors serving as professors at the Imperial University of Tokyo, especially John Milne until he left Japan in 1895, as well as Japanese colleagues including Seikei Sekiya who in 1880 became the first professor of seismology at Tokyo Imperial University. Early career Sekiya and Omori published the first clear record of a destructive earthquake, obtained by their measuring devices at the university. In 1886 Sekiya was made chair of seismology and secretary to the Imperial Earthquake Investigation Committee and by the time of his death a decade later, Japan had nearly 1000 seismological recording stations to study seism ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Meteorological Agency
The , abbreviated JMA, is an agency of the Ministry of Land, Infrastructure, Transport and Tourism. It is charged with gathering and providing results for the public in Japan that are obtained from data based on daily scientific observation and research into natural phenomena in the fields of meteorology, hydrology, seismology and volcanology, among other related scientific fields. Its headquarters is located in Minato, Tokyo. JMA is responsible for gathering and reporting weather data and forecasts for the general public, as well as providing aviation and marine weather. JMA other responsibilities include issuing warnings for volcanic eruptions, and the nationwide issuance of earthquake warnings of the Earthquake Early Warning (EEW) system. JMA is also designated one of the Regional Specialized Meteorological Centers of the World Meteorological Organization (WMO). It is responsible for forecasting, naming, and distributing warnings for tropical cyclones in the Northweste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismological Society Of Japan
The or SSJ is a learned society ( professional association) with the goal of advancing the understanding of earthquakes and other seismic phenomena. History John Milne joined James Alfred Ewing, Thomas Lomar Gray and Thomas Corwin Mendenhall in founding the Seismological Society in 1880. These men were teaching at the Imperial College of Tokyo (now called the University of Tokyo) and were foreign advisors to the government in Meiji period Japan (''o-yatoi gaikokujin''). The founding president of the society was Hattori Ichizo. Publications The organization publishes the abbreviated at "J Seismol Soc Jpn". The publication is also known as ''Zisin'', which is a syllabic abbreviation. The SSJ also sponsors the journal ''Earth, Planets and Space ''Earth, Planets and Space'' is a peer-reviewed open access scientific journal published by Springer Science+Business Media and Terra Scientific Publishing Company on behalf of five Japanese learned societies: * Seismological So ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial College Of Engineering
The Imperial College of Engineering (工部大学校, ''Kōbudaigakkō'') was a Japanese institution of higher education that was founded during the Meiji Era. The college was established under the auspices of the Ministry of Public Works for the training of young Japanese engineers. Supporting Japan’s rapid industrialization at the end of the 19th century, the college commenced teaching in October 1873 soon after the initial cohort of teaching staff arrived from United Kingdom. The college was an immediate precursor to the establishment of the University of Tokyo’s Faculty of Engineering in 1877. Foundation 250px, Henry Dyer In the process of founding the Public Works, Edmund Morel, a chief engineer for Railway Department of the Meiji Japanese government emphasized importance of engineering institution, which would create young Japanese engineers and technicians leading rapid modernization without help of foreign officers. On September 24, 1871, the Public Works wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Milne
John Milne (30 December 1850 – 31 July 1913) was a British geologist and mining engineer who worked on a horizontal seismograph. Biography Milne was born in Liverpool, England, the only child of John Milne of Milnrow, and at first raised in Tunshill and later moved to Richmond, London, and then in 1895 to the Isle of Wight with his wife. He was educated at King's College London (AKC in Applied Science, 1870) and the Royal School of Mines. Early career In the summers of 1873 and 1874, following a recommendation by the Royal School of Mines, Milne was hired by Cyrus Field as a mining engineer to explore Newfoundland and Labrador in search of coal and mineral resources. During this time he also wrote papers on the interaction of ice and rock, and visited Funk Island, writing another paper on the newly extinct great auk. In December 1873 Milne accompanied Dr Charles Tilstone Beke on an expedition to determine the true location of Mount Sinai in northwest Arabia. He took th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismology
Seismology (; from Ancient Greek σεισμός (''seismós'') meaning "earthquake" and -λογία (''-logía'') meaning "study of") is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies. It also includes studies of earthquake environmental effects such as tsunamis as well as diverse seismic sources such as volcanic, tectonic, glacial, fluvial, oceanic, atmospheric, and artificial processes such as explosions. A related field that uses geology to infer information regarding past earthquakes is paleoseismology. A recording of Earth motion as a function of time is called a seismogram. A seismologist is a scientist who does research in seismology. History Scholarly interest in earthquakes can be traced back to antiquity. Early speculations on the natural causes of earthquakes were included in the writings of Thales of Miletus (c. 585 BCE), Anaximenes of Miletus (c. 550 BCE), Aristotle (c. 340 BCE), and Z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foreign Government Advisors In Meiji Japan
The foreign employees in Meiji Japan, known in Japanese as ''O-yatoi Gaikokujin'' (Kyūjitai: , Shinjitai: , "hired foreigners"), were hired by the Japanese government and municipalities for their specialized knowledge and skill to assist in the modernization of the Meiji period. The term came from ''Yatoi'' (a person hired temporarily, a day laborer), was politely applied for hired foreigner as ''O-yatoi gaikokujin''. The total number is over 2,000, probably reaches 3,000 (with thousands more in the private sector). Until 1899, more than 800 hired foreign experts continued to be employed by the government, and many others were employed privately. Their occupation varied, ranging from high salaried government advisors, college professors and instructor, to ordinary salaried technicians. Along the process of the opening of the country, the Tokugawa Shogunate government first hired, German diplomat Philipp Franz von Siebold as diplomatic advisor, Dutch naval engineer Hendrik Hardes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University Press
Cambridge University Press is the university press of the University of Cambridge. Granted letters patent by King Henry VIII in 1534, it is the oldest university press in the world. It is also the King's Printer. Cambridge University Press is a department of the University of Cambridge and is both an academic and educational publisher. It became part of Cambridge University Press & Assessment, following a merger with Cambridge Assessment in 2021. With a global sales presence, publishing hubs, and offices in more than 40 countries, it publishes over 50,000 titles by authors from over 100 countries. Its publishing includes more than 380 academic journals, monographs, reference works, school and university textbooks, and English language teaching and learning publications. It also publishes Bibles, runs a bookshop in Cambridge, sells through Amazon, and has a conference venues business in Cambridge at the Pitt Building and the Sir Geoffrey Cass Sports and Social Centre. Being p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feudalism
Feudalism, also known as the feudal system, was the combination of the legal, economic, military, cultural and political customs that flourished in medieval Europe between the 9th and 15th centuries. Broadly defined, it was a way of structuring society around relationships that were derived from the holding of land in exchange for service or labour. Although it is derived from the Latin word ''feodum'' or ''feudum'' (fief), which was used during the Medieval period, the term ''feudalism'' and the system which it describes were not conceived of as a formal political system by the people who lived during the Middle Ages. The classic definition, by François Louis Ganshof (1944),François Louis Ganshof (1944). ''Qu'est-ce que la féodalité''. Translated into English by Philip Grierson as ''Feudalism'', with a foreword by F. M. Stenton, 1st ed.: New York and London, 1952; 2nd ed: 1961; 3rd ed.: 1976. describes a set of reciprocal legal and military obligations which existed am ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
