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China

China, with its vast geographic mass and population, has unique challenges in planning and preparing for disaster relief. Historically, China has suffered some of the largest natural disasters ever, at least when judged in terms of loss of life. China has endured six of the world's top 10 deadliest natural disasters, including the top three: the 1931 China floods, in which between two and four million perished; the 1887 Yellow River floods, which caused between one and two million fatalities; and the 1556 Shaanxi earthquake, which resulted in over 800,000 deaths. China's natural propensity for earthquakes and flooding creates an atmosphere where governmental preparation and response is essential. The Chinese government has a great interest in protecting Chinese lives and property. This interest, coupled with a concern for the sustained and systematic development of China's economy, has made comprehensive, coordinated, and consistent planning to prevent disasters a priority.

Chinese disaster management has placed a priority upon avoiding, and not merely responding to, risks before they occur. Such risks include natural disasters such as floods, earthquakes, and famines, as well as human-created catastrophes such as aviation crashes and chemical spills. The Chinese government plans and prepares for mitigation of potential risks; preparedness for possible disasters; quick, appropriate response; and recovery that restores areas to their previous state. The National Disaster Reduction Center (NDRC) of the Ministry of Civil Affairs (MCA) is the Chinese government's specialized agency that plans for and coordinates response to Chinese national disasters. The NDRC formulates policies that guide disaster management departments in their planning and preparation, and analyzes disasters that have occurred through case studies and advanced technology, including statistical modeling and satellite remote sensing.

Earthquakes

China's geographic location has long made it especially susceptible to major earthquakes; it has experienced some of the most catastrophic earthquakes known. Earthquakes are any abrupt movement within the Earth that is caused by a tectonic or volcanic disturbance; they result in seismic waves that often cause violent shaking on the Earth's surface. China is part of the Circum-Pacific Belt, which is comprised of many coastal areas along the Pacific Rim, including Japan, China, Taiwan, New Zealand, Alaska, and the western coasts of North and South America.

The Circum-Pacific Belt is the most active earthquake region in the world, accounting for an estimated 80 percent of all energy presently released from earthquakes. The earthquakes that occur in China are chiefly tectonic, which are strains in rock masses that create stresses exceeding the strength of the rock, resulting in a sudden fracturing. Rock masses are thrown in separate directions as a result of the fracture, or fault, and return to a position where there is less strain. This movement takes place in irregular steps, giving rise to the vibrations known as seismic waves. Geologic faults can at times be observed, showing relative displacements caused by earthquakes. The 1976 Tangshan earthquake, for example, caused a surface strike-slip of approximately one meter along the causative fault to the east of Beijing. Such strike-slips provide a lasting reminder of the destructive potential of earthquakes to the Chinese.

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