How to do a good job in disaster prevention and reduction

What is an earthquake? Earthquake is the ground vibration caused by the dislocation and fracture of underground strata under stress. It is a natural phenomenon like typhoon, rainstorm, flood and lightning. Earthquake is the first natural disaster. Earthquakes happen every day on the earth, and there are about 5 million earthquakes every year in the world. Most earthquakes are not felt because of their small magnitude. Among them, there were about 50,000 felt earthquakes, nearly 1,000 earthquakes that caused damage, and only a dozen earthquakes of magnitude 7 or above that caused great damage, and most of them occurred in sparsely populated areas. Basic knowledge of earthquake The origin of earthquake vibration is called the source; The place on the ground opposite the earthquake source is called the epicenter; The distance from other parts of the ground to the epicenter is called epicentral distance; The distance to the source is called the source distance; The vertical distance from the epicenter to the source is called the focal depth. How to prevent shock in school-when in class, under the command of the teacher, hold your head quickly, close your eyes and hide under the desk. When in the playground or outdoors, you can squat down and cover your head with your hands. Pay attention to avoid tall buildings or dangerous objects. Don't go back to the classroom Evacuation should be organized after the earthquake. If necessary, classes should be held outdoors. China is a country with many earthquakes. China is located between the two major seismic belts in the world-the Pacific Rim seismic belt and the Eurasian seismic belt. Crushed by the Pacific plate, India plate and Philippine Sea plate, the seismic fault zone is very developed. Since the beginning of this century, there have been nearly 800 earthquakes of magnitude 6 or above in China, covering all provinces, autonomous regions and municipalities except Guizhou and Zhejiang provinces and the Hong Kong Special Administrative Region. China is a country with severe earthquake disasters because of its high frequency, high intensity, shallow focal point and wide distribution. Since 1900, the number of earthquake deaths in China has reached 550,000, accounting for 53% of the global earthquake deaths; Since 1949, destructive earthquakes have occurred in 22 provinces (autonomous regions and municipalities directly under the Central Government) 100 times, including the eastern region 14 provinces, resulting in more than 270,000 deaths, accounting for 54% of all kinds of disaster deaths in China, with an earthquake-affected area of more than 300,000 square kilometers and 7 million houses collapsed. The severity of natural disasters such as earthquakes is one of the basic national conditions in China. The seismic activity in China is mainly distributed in 23 seismic zones in five regions. The seismic activity in China is mainly distributed in 23 seismic zones in five regions. These five areas are: ① Taiwan Province Province and its adjacent waters; (2) Southwest China, mainly Tibet, western Sichuan and central and western Yunnan; (3) Northwest China, mainly distributed in Hexi Corridor of Gansu, Qinghai and Ningxia and the foothills of Tianshan Mountain; ④ North China, mainly located on both sides of Taihang Mountain, Wei Fen Valley, Yinshan-Yanshan area, Luzhong and Bohai Bay; ⑤ Southeast coastal areas such as Guangdong and Fujian. Taiwan Province province in China is located in the Pacific Rim seismic belt, Tibet, Xinjiang, Yunnan, Sichuan and Qinghai provinces are located in the Himalayan-Mediterranean seismic belt, and other provinces are located in related seismic belts. The distribution of China's seismic zones is an important basis for formulating key earthquake monitoring and defense areas in China.