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2008 Sichuan Earthquake

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2008 Sichuan Earthquake
Background
Sichuan is a province in the south west of China and is home to 80 million people. The provincial capital is Chengdu. The earthquake struck the province on May 12 at 02:28 China Standard time. It was measured to be 7.9 in magnitude. The epicentre was in Wenchuan County, 80km northwest of Chengdu. It had a focal depth of 19km. The earthquake was felt over 1700km in Beijing and in neighbouring countries. There was over 150 major aftershocks measured and around 47000 in total.
Causes
The earthquake occurred along the Longmenshan fault, a thrust structure along the border of the Indo-Australian and Eurasian Plates. Seismic activity was concentrated on the mid-fracture and the rupture of the fault lasted 120 seconds. The shallowness of the earthquake allowed it to travel long distances without losing power and so could cause more damage. The largest aftershock was magnitude 6.4. At the fault the land slipped around 9m, which caused such a large amount of energy to be released. High stress accumulation occurred along the fault and sudden dislocation of the fault caused the earthquake.
Effects
Large scale evacuation occurred in many provinces around China, including Chengdu airport and the Ford plant. The disruption to flights meant that airlines had to land at alternate airports, and that many flights were delayed. Cracks appeared in many buildings in Chengdu; however no buildings collapsed in the city.
All highways into Wenchuan were damaged, reducing the ability for aid workers to get in. In Beichuan county 80% of buildings were reported to have collapsed and in the city of Shifang, 80 tons of liquid ammonia leaked due to the destruction of the chemical plants. In Dujiangyan a whole school collapsed, killing 840 of the 900 students. Many other schools collapsed and were excavated by civilians.
Large scale suspension of

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