在分析地质构造背景和深部地球物理特征的基础上，通过对震区断裂构造、震源机制解、震源深度、极震区展布方向、余震空间分布、地震裂缝和地面运动方向的综合研究，确定了１９９５年７月２２日永登５．８级地震的发震构造，探讨了形成该次地震的构造力学机制问题，认为该次地震是在局部构造应力直接作用下导致窑街—周家台隐伏断裂重新活动的结果 Based on the analysis of geological structure and deep geophysical characteristics, through the comprehensive study of fracture structure, focal mechanism solution, focal depth, direction of polar shock zone, aftershock spatial distribution, seismic fractures and direction of ground motion, The seismogenic structure of the 1998 Yongdeng 5.8 Ms 5.8 earthquake was discussed and the tectonic mechanics mechanism of the earthquake was discussed. It is believed that the earthquake caused a direct result of the local tectonic stress to cause the Yaowang-Zhoujiatai buried fault Re-activity results