Earthquake-Enemy or Friend There is no doubt that earthquake is one of the most harmful disasters in the world, and its direct disasters include: house collapse, ground collapse, landslides and so on. But also lead to secondary disasters, mainly fire, flood, gas leakage, plague and so on. 65438+On February 26th, 2004, the earthquake near Sumatra Island in Indonesia triggered the biggest tsunami in 40 years, which brought great disasters and made people more worried about the "earthquake". But earthquakes not only hurt human beings, but also bring many benefits to human beings. Earthquakes have created countless strange mountains and strange waters. The beautiful Huangshan Mountain, the majestic Huashan Mountain, the steep and majestic Taishan Mountain and the deep and beautiful Hengshan Mountain in China are all fault-block mountains. Qinghai Lake, Dongting Lake, Poyang Lake, Weishan Lake in Shandong and Dianchi Lake in Yunnan are all faulted lakes. These amazing masterpieces of nature were actually made by an earthquake that people talked about. The earthquake caused the crust to move violently, which led to the formation fracture, and a fault block mountain was formed at the fault uplift. Sinking lakes and basins will be formed in sinking depressions. Many mineral resources come from earthquakes. During the earthquake, the relative movement of the earth's crust pushed the minerals buried deep underground to the surface, which provided convenience for human beings to find minerals. For example, the Jinsha River, Lancang River and Nujiang River areas at the junction of Sichuan, Yunnan and Tibet provinces in Hengduan Mountain area of China are located at the junction of Asia-Europe plate and Indian Ocean plate, where the crustal movement is intense and there are many earthquakes, forming a polymetallic metallogenic belt with a length of nearly 1000 km from north to south and an area of 550,000 square kilometers. The scale of the deposit is very large, which is a world-class metallogenic scale area. Hengshan Mountain in Nanyue, one of the five mountains, has formed more than 30 kinds of minerals such as gypsum, porcelain clay, albite, potash feldspar, purple clay, gold, quartzite, granite and coal in the mountains hundreds of kilometers long due to the strong crustal movement in the early stage. With the development of mineral resources in surrounding areas, Nanyue will become a new industrial zone with both tourism characteristics and glass-ceramics raw material industry characteristics in Hunan Province. In addition, people also explore oil by artificially creating earthquakes. To find oil, we must first find the underground structure of oil. Because these structures are too deep to be discovered by intuitive methods, explorers invented the seismic exploration method. First, they caused a slight earthquake by blasting. At the same time, they use special instruments to record the time of seismic wave propagation, reflection and refraction underground, as well as the shape of vibration. After computer processing, they can preliminarily judge the depth and shape of underground structures and determine the location of oil production drilling. Daqing, Shengli, Liaohe and Tarim oilfields in China were all discovered by this method. On the scale of millions or even hundreds of millions of years on earth, these "disasters" have never stopped and will never stop. On the one hand, they bring disasters to mankind; On the other hand, mankind has a considerable level of science and technology and sufficient conditions for development, and has and will show broad prospects for development and utilization.