In the earthquake, the most basic p

In the earthquake, the most basic phenomenon is the continuous vibration of the ground, whose main feature is that we can feel the vibration of the earth. People in the earthquake area have felt the vibration before, sometimes they jump around first. Since the seismic wave propagates from the ground to the ground, the longitudinal wave first arrives. Then, the shear wave produces large horizontal vibration, which is the main cause of earthquake disaster. The earthquake has a great influence on the natural landscape, and its main consequence is the occurrence of faults and ground cracks. In large earthquakes, the surface faults often extend a long distance, and are often accompanied by more prominent vertical and horizontal faults, which reflect the structural changes of the source. A big earthquake will change the local topography, uplift or subsidence.