An earthquake is any shaking of the ground, usually intense shaking of the ground caused by either natural sources or by humans. There are many different types of earthquakes. The most common is tectonic earthquake, which occur when rocks in the earth's crust break due to geological forces created by movement of tectonic plates. Another type of earthquake is called volcanic earthquake, occurring in conjunction with volcanic activity. And also there are various types of earthquakes caused by man-made activities, which caused directly by human involvement, has been recorded as a result of water filling large dams, development of mineral, geothermal and hydrocarbon resources, waste injection, underground nuclear explosions and large-scale construction projects. This type of earthquake includes collapse earthquake, explosion earthquake and induced earthquake due to water filling large dams (Talwani, 1997; Chen & Talwani, 1998) and so on. Earthquake is the rapid vibration of the earth surface whose acceleration motion can easily cause the destruction of hydraulic structures. The relative deformation of the hydraulic structures increases when the inertial force caused by the earthquake increases suddenly. For the hydrodynamic pressure acting on the reservoir, dam foundation may appear relative deformation or different stage deformation. For example, those parts of concrete dams, including dam crest, fold slope, orifice inside the dam and corridor, are easily cracked, which may damage and then cause the leakage of the dam body, even the collapse of the structures after the earthquake. As it to the earth-rock dam, it is easy to appear cracks in dam in the process of the earthquake, meanwhile, dam foundation or dam body may collapse caused by earthquake liquefaction if the sands inside them are not fully roller compaction. Thus earthquake may cause the unsafe of the hydraulic structures, even dam breach which may threatened the life and property safety of the people downstream the river.