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Xianshuihe Fault System
The Xianshuihe fault system is a major active sinistral (left-lateral) strike-slip fault zone in southwestern China, at the eastern edge of the Tibetan Plateau. It has been responsible for many major earthquakes, and is one of the most seismically active fault zones in this part of China. Tectonic setting The Xianshuihe fault system lies within the complex zone of continental collision between the Indian Plate and the Eurasian Plate. It forms one of a set of sinistral fault zones that help accommodate the eastward spreading of the Tibetan Plateau. The fault zone defines the northern and eastern edges of the Sichuan-Yunnan block, and the southeastern boundary of the Bayan Har block. Geometry The Xianshuihe fault system comprises several distinct segments, with an overall length of about 350 km. The main segments are the Ganzi (or Ganzi-Yushu), the Xianshuihe, the Anninghe-Zemuhe, and the Xiaojiang faults. Seismicity Movements on this fault system have been responsible for man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Seismic Faults Of Asia
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 Zhan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xianshui River
Xianshui River () — a river in Sichuan province, southern China. Geography The Xianshui River has three river sources, the Da-chu river (Chinese characters:达曲) and Nyi-chu river (Chinese characters:泥曲).http://www.cwru.edu/affil/tibet/booksAndPapers/Gelek/Gelek_east.pdf After the confluence of the two rivers in Luhuo, the name becomes the Xianshui River. A dam and hydroelectric plant on it in Luhuo was completed in 2009. ;Yangtze River The Xianshui River flows into the Yalong River at Yajiang. Via the Yalong River confluence, the Xianshui is a tributary of the Yangtze River (Chang Jiang). See also *Xianshuihe fault system The Xianshuihe fault system is a major active sinistral (left-lateral) strike-slip fault zone in southwestern China, at the eastern edge of the Tibetan Plateau. It has been responsible for many major earthquakes, and is one of the most seismicall ... * Index: Tributaries of the Yangtze River References {{Coord, 30.2053, N, 101.0073, E, sour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2022 Luding Earthquake
A 6.7 ( 6.8) earthquake struck Luding County in Sichuan provinces of China, province, China on 5 September 2022 at 12:52:19 Time in China, local time. The epicenter was located from Chengdu, or southeast of Kangding. Ninety-three people died, 424 were injured and 24 remained missing. More than 13,000 homes and other infrastructure were damaged or destroyed. It was the largest earthquake to strike the province 2017 Jiuzhaigou earthquake, since 2017. Tectonic setting Sichuan is situated in a complex zone of faulting created by the continued collision of the Indian Plate with the Eurasian Plate. As Himalayan underthrusting continues, the crust of the Eurasian Plate is deformed and uplifted to form the Tibetan Plateau. Instead of thrust faulting to its south, the Tibetan Plateau accommodates deformation through strike-slip Indenter tectonics, escape tectonics. Large amounts of strike-slip motion are accommodated through major faults and their splays along the plateau, such as the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2010 Yushu Earthquake
The 2010 Yushu earthquake struck on April 14 and registered a magnitude of 6.9 Mw (USGS, EMSC) or 7.1 MsAbout 400 dead, 10,000 injured in 7.1-magnitude quake in China's Qinghai , xinhuanet.com. Retrieved 14 April 2010. ( CEA, CENC). It had a maximum felt intensity of IX (''Violent'') on the . It originated in [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1981 Dawu Earthquake
The 1981 Dawu earthquake occurred on , in Sichuan, China. Registering a surface wave magnitude of 6.8, the earthquake killed about 150 people and injured roughly 300 more. It caused comprehensive damage within close range of its epicenter. Background China has an extensive history of catastrophic earthquakes that ranges back to 1290. The first verified earthquake took place in Chih-li, killing roughly 100,000 people. The next great earthquake was probably the 1556 Shaanxi earthquake, the most devastating earthquake of all time. Roughly 830,000 were killed by the event. Other earthquakes in 1917, 1918, 1920, 1923, 1925, 1927, 1931, 1932, 1933, 1948, 1950, 1966, 1969, 1970, 1974, 1975, 1976 each killed at least one thousand people. Since 1981, earthquake fatalities have diminished greatly, though have not been stopped. As recently as 2008, an earthquake in Sichuan killed nearly 90,000 people. Characteristics The epicenter was pinpointed to Dawu County in Sichuan. Its offici ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1973 Luhuo Earthquake
The 1973 Luhuo earthquake struck near the town of Zhaggo in the Garzê Tibetan Autonomous Prefecture of Sichuan Province, China on February 6 with a magnitude of 7.6 . The earthquake had a maximum intensity of X (''Extreme'') on the Mercalli intensity scale, resulting in 2,199 deaths and a further 2,743 injuries in Sichuan. Serious and widespread destruction to villages was reported in Luhuo County as a result of the earthquake. Tectonic setting Western Sichuan is situated at the edge of the Tibetan Plateau in a vast zone of complex continental deformation caused by the collision of the Indian Plate with the Eurasian Plate. As the thrusting of the Indian Plate beneath the Eurasian Plate along the Himalayas continues, the continental crust within the Eurasian Plate is actively uplifted and thickened, forming the Tibetan Plateau. As there are no active thrust structures within the plateau, compression is accommodated by strike-slip motion along large structures including the Altyn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1955 Zheduotang Earthquake
The 1955 Zheduotang earthquake, also known as the Kangding earthquake occurred on April 14 at 09:29:02 Time in China, local time near the city of Kangding in the Garzê Tibetan Autonomous Prefecture, Sichuan. The earthquake had a moment magnitude of 7.0 and a surface wave magnitude of 7.1 and struck at a depth of 10 km. Severe damage occurred in Kangding with the loss of 70 lives. Tectonic setting Western Sichuan is situated at the edge of the Tibetan Plateau in a vast zone of complex continental deformation caused by the Geology of the Himalaya, collision of the Indian Plate with the Eurasian Plate. As the thrusting of the Indian Plate beneath the Eurasian Plate along the Himalayas continues, the continental crust within the Eurasian Plate is actively uplifted and thickened, forming the Tibetan Plateau. As there are no active thrust structures within the plateau, compression is accommodated by strike-slip motion along large structures including the Altyn Tagh Fault, Kunlun Fault ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1923 Renda Earthquake
The 1923 Renda earthquake occurred on March 24 at 20:40 local time between the counties of Daofu and Luhuo in Sichuan, China. The estimated 7.0–7.3 earthquake was assigned a maximum modified Mercalli intensity scale rating of X (''Extreme''). Severe damage occurred in Sichuan, killing an estimated 4,800 people. Tectonic setting Western Sichuan is situated at the edge of the Tibetan Plateau in a vast zone of complex continental deformation caused by the collision of the Indian Plate with the Eurasian Plate. As the thrusting of the Indian Plate beneath the Eurasian Plate along the Himalayas continues, the continental crust within the Eurasian Plate is actively uplifted and thickened, forming the Tibetan Plateau. As there are no active thrust structures within the plateau, compression is accommodated by strike-slip motion along large structures including the Altyn Tagh Fault, Kunlun Fault, Haiyuan Fault and Xianshuihe fault system. Left-lateral strike-slip motion squeezes th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1850 Xichang Earthquake
The 1850 Xichang earthquake rocked Sichuan Province of the Qing dynasty on September 12. The earthquake which caused major damage in Xichang county had an estimated moment magnitude of 7.6–7.9 and a surface wave magnitude of 7.5–7.7 . An estimated 20,650 people died. Tectonic setting Sichuan is situated at the edge of the Tibetan Plateau in a vast zone of complex continental deformation caused by the collision of the Indian Plate with the Eurasian Plate. As the thrusting of the Indian Plate beneath the Eurasian Plate along the Himalayas continues, the continental crust within the Eurasian Plate is actively uplifted and thickened, forming the Tibetan Plateau. There are no active thrust structures within the plateau, therefore, compression is accommodated by strike-slip motion along large structures including the Altyn Tagh Fault, Kunlun Fault, Haiyuan Fault and Xianshuihe fault system. Left-lateral strike-slip motion squeezes the crustal blocks of the Tibetan Plateau outwar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aseismic Creep
In geology, aseismic creep or fault creep is measurable surface displacement along a fault in the absence of notable earthquakes. Aseismic creep may also occur as "after-slip" days to years after an earthquake. Notable examples of aseismic slip include faults in California (e.g. Calaveras Fault, Hayward Fault, and San Andreas Fault). Causes Aseismic creep accommodates far-field motions on localized zones of deformation at tectonic plate boundaries. The underlying causes of aseismic creep are primarily attributed to poor frictional strength of the fault, low normal stress acting on the fault in the shallow crust, and excessive pore-fluid pressures, which limit the viable amount of normal stress on a fault. The frictional reaction of geologic materials can explain the transition from seismic to aseismic deformation with depth. Friction along faults can cause sudden slips with associated stress drops (earthquakes), along with phases of no motion as stress recharges. Measurements ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
