节点文献
1995年7月22日永登5.8级地震发震构造和发震机制分析
RESEARCH ON THE CAUSATIVE STRUCTURE AND SEISMOGENIC MECHANISM OF THE YONGDENG M S 5.8 EARTHQUAKE, GANSU, ON JULY 22 1995
【摘要】 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
【Abstract】 Based on the analysis of the geological tectonics setting and deep seated geophysical characteristics, the causative structure of the Yongdeng M S 5.8 earthquake on July 22, 1995 has been determined by the synthetical study of the faults in the earthquake area, focal mechanism solution, focal depths, meizoseismal region direction, post earthquake distribution, earthquake fissures and ground motion direction. The tectonodynamic mechanism forming this earthquake has also been approached. It is considered that the earthquake results from the reactivation of the Yaojie Zhoujiatai buried fault under the direct action of local tectonic stress.
【Key words】 Gansu; Triggering seismic fault; Seismogenic condition; Seismogenic mechanism; Yongdeng earthquake;
- 【文献出处】 西北地震学报 ,NORTHWESTERN SEISMOLOGICAL JOURNAL , 编辑部邮箱 ,1996年03期
- 【分类号】P315.2
- 【被引频次】18
- 【下载频次】48