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1786 Kangding-Luding Earthquake
An earthquake occurred on 1 June 1786 in and around Kangding, in what is now China's Sichuan province. It had an estimated magnitude of about 7.75 and a maximum perceived intensity of X (''Extreme'') on the Mercalli intensity scale. The initial quake killed 435 people. After an aftershock ten days later, a further 100,000 died when a landslide dam collapsed across the Dadu river. Tectonic setting Sichuan lies within the complex zone of deformation associated with the continuing collision between the India Plate and the Eurasian Plate. The thickened crust of the Tibetan plateau is spreading to the east causing the southward motion of the Sichuan-Yunnan block. The eastern side of this block is bounded by the Xianshuihe fault system, a major left lateral strike-slip fault zone. Movement on this fault zone has been responsible for many major damaging earthquakes, such as the 1981 Dawu earthquake. Earthquake An isoseismal map constructed for this earthquake shows that the zone of m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moment Magnitude Scale
The moment magnitude scale (MMS; denoted explicitly with or Mw, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. It was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori. Similar to the local magnitude scale, local magnitude/Richter scale () defined by Charles Francis Richter in 1935, it uses a logarithmic scale; small earthquakes have approximately the same magnitudes on both scales. Despite the difference, news media often says "Richter scale" when referring to the moment magnitude scale. Moment magnitude () is considered the authoritative magnitude scale for ranking earthquakes by size. It is more directly related to the energy of an earthquake than other scales, and does not saturate—that is, it does not underestimate magnitudes as other scales do in certain conditions. It has become the standard scale used by seismological authorities like the U.S. Geological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isoseismal Map
In seismology, an isoseismal map is used to show lines of equally felt seismic intensity, generally measured on the Modified Mercalli scale. Such maps help to identify earthquake epicenters, particularly where no instrumental records exist, such as for historical earthquakes. They also contain important information on ground conditions at particular locations, the underlying geology, radiation pattern of the seismic waves, and the response of different types of buildings. They form an important part of the macroseismic approach, i.e. that part of seismology dealing with noninstrumental data. The shape and size of the isoseismal regions can be used to help determine the magnitude, focal depth, and focal mechanism of an earthquake. History The first known isoseismal map was produced for the 1810 earthquake in Mór in Hungary, and published by Kitaibel and Tomtsányi in 1814. The first, six-level intensity scale was proposed by Egen in 1828 for an earthquake in Rhineland. Robert M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1786 Earthquakes
Events January–March * January 3 – The third Treaty of Hopewell is signed, between the United States and the Choctaw. * January 6 – The outward bound East Indiaman '' Halsewell'' is wrecked on the south coast of England in a storm, with only 74 of more than 240 on board surviving. * February 2 – In a speech before The Asiatic Society in Calcutta, Sir William Jones notes the formal resemblances between Latin, Greek, and Sanskrit, laying the foundation for comparative linguistics and Indo-European studies. * March 1 – The Ohio Company of Associates is organized by five businessmen at a meeting at the Bunch-of-Grapes Tavern in Boston, to purchase land from the United States government to form settlements in what is now the U.S. state of Ohio. * March 13 – Construction begins in Dublin on the Four Courts Building, with the first stone laid down by the United Kingdom's Viceroy for Ireland, the Duke of Rutland. April–June * Apri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquakes In Sichuan
An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from those that are so weak that they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time period. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume. The word ''tremor'' is also used for non-earthquake seismic rumbling. At the Earth's surface, earthquakes manifest themselves by shaking and displacing or disrupting the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Historical Earthquakes
Historical earthquakes is a list of significant earthquakes known to have occurred prior to the beginning of the 20th century. As the events listed here occurred before routine Seismometer, instrumental recordings, they rely mainly on the analysis of written sources. There is often significant uncertainty in location and magnitude and sometimes date for each earthquake. The number of fatalities is also often highly uncertain, particularly for the older events. Pre-11th century 11th–18th centuries 19th century Source for all events with 'USGS' labelled as the source United States Geological Survey (USGS''Note: Magnitudes are generally estimations from intensity data. When no magnitude was available, the Mercalli intensity scale, maximum intensity, written as a Roman numeral from I to XII, is given.'' See also * :Articles on pre-1900 earthquakes * List of 20th-century earthquakes * List of 21st-century earthquakes * List of tsunamis * Lists of earthquakes * List of megath ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In Sichuan ...
This is a list of earthquakes that occurred in Sichuan province of China. Earthquakes with magnitude of 7.0 or greater Earthquakes registering magnitudes between 6.0 and 6.9 See also *List of earthquakes in Yunnan References {{Earthquakes in China Sichuan earthquakes An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In China
This is a List of earthquakes in China, part of the series of lists of disasters in China. China has been the location of some of the most deadly earthquakes in history. The deadliest was the 1976 Tangshan earthquake with 300,000+ deaths. Earthquakes in the loess plateau where residents lived in yaodong caves tended to have big casualties, including the 1303 Hongdong and 1920 Haiyuan earthquakes. The most recent earthquake with a death toll of more than a thousand was the 2010 Yushu earthquake, which killed 2,698. The collision of India with the rest of Asia has led to seismic activity throughout Western China, particularly in Tibet and the Yunnan, Xinjiang, Sichuan, Gansu and Qinghai provinces. However, these regions in comparison with Eastern China have a low population density. These areas also in general have poorer transport and building codes. Throughout China, poor building codes increases the damage and loss of life from earthquakes. The northern regions of Eastern Chi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luzhou
Luzhou (; Sichuanese Pinyin: Nu2zou1; Luzhou dialect: ), formerly transliterated as Lu-chou or Luchow, is a prefecture-level city located in the southeast of Sichuan Province, China. The city, named Jiangyang until the Southern and Northern Dynasties, is known as the "Liquor City" (). Situated at the confluence of the Tuo River and the Yangtze River, Luzhou is not only an important port on the Yangtze river, but also the largest port in both size and output in Sichuan province since Chongqing was separated from Sichuan province in 1997. As of the 2020 Chinese census, its population was 4,254,149 inhabitants whom 1,241,273 lived in the built-up (''or metro'') area made of Jiangyang and Longmatan districts, as Naxi district is not conurbated yet. Luzhou, which borders Yunnan, Guizhou and Chongqing, is the only geographic junction of the four provinces, and was therefore the logical place for a port in ancient China. After the PRC was founded in 1949, Luzhou became the capital of s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yibin
Yibin (; Sichuanese Pinyin: nyi2bin1; Sichuanese Mandarin, Sichuanese pronunciation: ) is a prefecture-level city in the southeastern part of Sichuan province, China, located at the junction of the Min River (Sichuan), Min and Yangtze Rivers. Its population was 4,588,804 inhabitants, according to the 2020 census, of whom 2,158,312 lived in the built-up area comprising three urban districts. History Human habitation of Yibin dates back at least 4,000 years. Yibin was established as a county in the Han dynasty (206 BC − AD 220). Under the Ming dynasty, Ming and Qing dynasty, Qing, the town and its hinterland was known as Xuzhou fu (administrative subdivision), Commandery pinyin, p''Xùzhōufǔ''), which was variously romanized as Suifu, Suifoo, and Suchow. Its population around 1907 was estimated at 50,000. Geography and climate Yibin is located in the southeast portion of Sichuan at the southern end of the Sichuan Basin, bordering Zhaotong (Yunnan) to the south, Luzhou to t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leshan
Leshan, formerly known as Jiading or Jiazhou, is a prefecture-level city located at the confluence of the Dadu and Min rivers in Sichuan Province, China. Leshan is located on the southwestern fringe of the Sichuan Basin in southern Sichuan, about from Chengdu.Leshan is an important industrial city in Sichuan, a regional center city in the south of Chengdu Economic Zone, an important hub city, an important transportation node and a port city in Chengdu-Chongqing.As of the 2020 census, its population was 3,160,168, of whom 1,236,188 lived in the built-up (''or metro'') area made of Shizhong, Wutongqiao, Shawan and Jinkouhe districts. Leshan is a famous historical and cultural city with the reputation of "Begonia Fragrance Country". It is the first open-door city, model green city, excellent tourist city, national garden city and national health city. Leshan has three world-class heritage sites - world natural and cultural heritage Emei Mountain and Leshan Buddha, world irrigation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yuexi County, Sichuan
Yuexi County, Sichuan () is a county located in the north of the Liangshan Yi Autonomous Prefecture, in the south of Sichuan Province, China. Fauna The frog species ''Oreolalax liangbeiensis'', ''Oreolalax puxiongensis'', and ''Oreolalax pingii'' are endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ... to Yuexi County. The former two have only been recorded in the town of Puxiong (). Climate References Liangshan Yi Autonomous Prefecture Amdo County-level divisions of Sichuan {{Sichuan-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
