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地震,是指地壳某个部分的岩石在内、外营力作用下突发剧烈运动而引起的一定范围内的地面震动现象。地震可分为天然地震和人工地震两大类型。天然地震是由于地球内部活动而引发的地震,一般包括构造地震、火山地震及其他天然扰动(如洞穴塌陷、山崩、大型滑坡、大块陨石坠落等)所引起的地震。其中,构造地震为数最多,占天然地震的绝大部分,其强度大,持续时间长,危害也最大。人们通常所说的地
Earthquake refers to a certain range of ground vibration caused by sudden and strenuous exercise under the external and external force of the rocks in a certain part of the crust. Earthquakes can be divided into two types of natural earthquakes and artificial earthquakes. Natural earthquakes are earthquakes caused by activities inside the earth and generally include earthquakes caused by structural earthquakes, volcanic earthquakes and other natural disturbances such as cave collapse, landslides, landslides, chunks of meteorites, and the like. Among them, the largest number of structural earthquakes, accounting for the vast majority of natural earthquakes, its strength, long duration, the greatest harm. People usually say that