从世界强震分布的规律来看,地震与断层,特别是与活动断层有着密切的关系,例如,我国的鲜水河断裂希,地震活动的频度高、强度亦大。美国的圣安德烈斯断层,在150年内共发生了30次大地震,在2000万年内错动了300余公里。1964年日本新潟7·5级地震,就是从断层的角度,事前被列为大地震危险区内的,因而震前有所准备。 Seen from the laws of the distribution of strong earthquakes in the world, the earthquakes and faults, especially the active faults, are closely related. For example, the Xianshuihe fault in our country is characterized by high frequency and great intensity of seismic activity. In the United States, the San Andres Fault, a total of 30 earthquakes occurred in 150 years and displaced more than 300 kilometers in 20 million years. The 1964 Niigata earthquake of 7.5 on the Richter scale was previously classified as a danger zone for major earthquakes from a fault point of view and was therefore prepared for the earthquake.