选用区域数字地震台网的波形资料,利用CAP方法反演了2011年3月3日久治-玛曲4.1级地震震源机制解。反演结果显示,本次地震的最佳双力偶解为节面Ⅰ走向3060倾角82°、滑动角-5°,节面Ⅱ走向37°、倾角85°、滑动角-172°,地震类型为走滑型,震源深度为5.5km,属于汶川地震后区域应力场调整引发的一次地震事件。
In this paper, using waveform from regional seismological network and CAP method, we get Jiuzhi - Maqu 4. 1 earthquake on March 3,2011. The result shows that the best double solution is 306°,82°and -5°for strike,dip and slip angles respectively with the other nodal plane of 37° ,85° and -172°. The earthquake belongs to strike-slip type and the focal depth is 5.5 kin. The regional stress adjustives after Wenchuan earth- quake arose the Jiuzhi-Maqu earthquake.