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1955 Zheduotang Earthquake
The 1955 Zheduotang earthquake, also known as the Kangding earthquake occurred on April 14 at 09:29:02 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 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1955 Yuzha Earthquake
The 1955 Yuzha earthquake (1955年鱼鲊地震) occurred on September 23, 1955, at 15:06 UTC (23:06 local time). The epicenter was located in the area around Lazha (拉鲊), Dalongtan (大龙潭) Township, Renhe District, Panzhihua and Yuzha (鱼鲊) Township, Huili County. Lazha then belonged to Yongren County, Yunnan and now within Sichuan. Yuzha then belonged to Huili County, Sichuan as it still does. The earthquake had a magnitude of 6.8. 728 people were reported dead and 1547 injured in the earthquake. More than 15000 rooms collapsed. Eight people died and seven houses collapsed in the Xigeda (昔格达) Village. Cracks ranging from 10 to 70 cm in width and 100 to 1,500 m in length occurred on hillsides and ridges. Landslides were observed along both banks of the Jinsha River. Many villages on both banks of the Jinsha River were destroyed. Rivers and springs dried up, and many new springs appeared. Changes of water level in wells and ditches were reported. Many village ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Normal Fault
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 C ... [...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 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, fro ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Earthquakes In 1955
This is a list of earthquakes in 1955. Only magnitude 6.0 or greater earthquakes appear on the list. Lower magnitude events are included if they have caused death, injury or damage. Events which occurred in remote areas will be excluded from the list as they wouldn't have generated significant media interest. All dates are listed according to UTC time. This was somewhat a year of contrast. The number of magnitude 7.0+ quakes was up on the previous year. The largest quake only reached 7.5 in magnitude. The death toll during the year was relatively low with most of the 504 deaths coming in the Philippines in March. Four-hundred died in the quake which struck Mindanao. Other deadly events struck most notably China and Egypt. Overall By death toll * Note: At least 10 casualties By magnitude * Note: At least 7.0 magnitude Notable events January February March April May June July August September October ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luding County
Luding County (), also known via its Tibetan name as Chagsam or Jagsam ) is a county located in the southeast of the Garzê Tibetan Autonomous Prefecture in Sichuan province, China. Luding County covers an area of , and has a population of 86,234 as of 2022. History Geography Luding County is bordered by Tianquan County, Yingjing County, and Hanyuan County to the east, Shimian County to the south, and Kangding to the west and north. The county is located within the Hengduan Mountains, within the southeastern edge of the Tibetan Plateau. The town of Luqiao, the county seat, sits at an elevation of above sea level. The highest point in the county is Mount Gongga, along the southwestern border with Kangding. Mount Erlang is also located on the county's edge. Climate Administrative divisions As of 2022, Luding County contains the following eight towns and one township: Former administrative divisions Demographics Luding County has a total population of 86,234 as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fissure
A fissure is a long, narrow crack opening along the surface of Earth. The term is derived from the Latin word , which means 'cleft' or 'crack'. Fissures emerge in Earth's crust, on ice sheets and glaciers, and on volcanoes. Ground fissure A , also called an , is a long, narrow crack or linear opening in the Earth's crust. Ground fissures can form naturally, such as from tectonic faulting and earthquakes, or as a consequence of human activity, such as oil mining and groundwater pumping. Once formed, ground fissures can be extended and eroded by torrential rain. They can be hazardous to people and livestock living on the affected surfaces and damaging to property and infrastructure, such as roads, underground pipes, canals, and dams. In circumstances where there is the extensive withdrawal of groundwater, the earth above the water table can subside causing fissures to form at the surface. This typically occurs at the floor of arid valleys having rock formations and compa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landslide
Landslides, also known as landslips, are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, deep-seated slope failures, mudflows, and debris flows. Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater, in which case they are called submarine landslides. Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as a heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable. Causes Landslides occur when the slope (or a portion of it) undergoes some processes that change its condition from stable to unstable. This is essentially due to a decrease in the shear stren ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2014 Kangding Earthquake
The 2014 Kangding earthquake struck Kangding County, Garzê Tibetan Autonomous Prefecture, Sichuan, China, with a moment magnitude of 5.9 on 22 November. The earthquake killed five and injured 54 people. Damage and casualties After the quake, the power and communication have not been interrupted, according to the local officials. As of 20:40 (UTC+8) on November 22, 2014, there is a power outage in five villages of Tagong Township (塔公乡). There is no major damage was reported in the town of Kangding, where CCTV, the official media, video showed residents strolling the town's streets, looking up at the steep surrounding hillsides and talking on their cellphones. About 100 vehicles were trapped by a landslide on a highway connecting Sichuan and Tibet, and Chengdu-Kunming Railway was also halted in the area while workers checked on damage to the line. As of 19:20 (UTC+8) on November 22, the government received 16 reports about this earthquake from 16 townships. There are thre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coulomb Stress Transfer
Coulomb stress transfer is a seismic-related geological process of stress changes to surrounding material caused by local discrete deformation events. Using mapped displacements of the Earth's surface during earthquakes, the computed Coulomb stress changes suggest that the stress relieved during an earthquake not only dissipates but can also move up and down fault segments, concentrating and promoting subsequent tremors. Importantly, Coulomb stress changes have been applied to earthquake-forecasting models that have been used to assess potential hazards related to earthquake activity. Coulomb stress change The Coulomb failure criterion requires that the Coulomb stress exceeds a value σf defined by the shear stress τB, normal stress σB, pore pressure p, and coefficient of friction μ of a failure plane, such that It is also often assumed that changes in pore fluid pressure induced by changes in stress are proportional to the normal stress change across the fault plane. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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