陕西宝鸡地区冯家山水库是一个小型水库。库坝为水石混合重力坝,坝高74米,库容量4亿立方米,1974年3月11日开始截流蓄水。当水位达到蓄水以来最高水位线706.11米时,在距大坝3—5公里的库区内连续发生了M_L=0.5小震35次,尤其是在1975年10月2日11时 Fengjiashan Reservoir in Baoji, Shaanxi Province is a small reservoir. Reservoir dam is a mixture of water and rock dam, dam height of 74 meters, 400 million cubic meters of storage capacity, March 11, 1974 began intercepting water storage. When the water level reached 706.11 meters, the highest water level since impoundment, M_L = 0.5 minor shock occurred 35 times continuously in the reservoir area 3-5 km away from the dam, especially at 11 o’clock on October 2, 1975