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本文采用了Crust2.0速度结构模型对青海地震台网记录到的2014年10月2日乌兰5.1级地震进行分析反演得到震源机制解及最佳震源深度。反演结果显示此次地震为逆冲型地震,其震源机制解:节面Ⅰ:走向293°,倾角44°,滑动角88°;节面Ⅱ:走向116°,倾角46°,滑动角92°。最佳矩形深度为15.7km,通过与中国地震局地球物理研究所及哈佛所得结果对比分析基本一致,表明其反演结果可靠合理。
In this paper, the Crust2.0 velocity structure model was used to analyze the focal mechanism solutions and the depths of the best hypocenters recorded by the Qinghai Seismological Station network on the October 2, 2014 Ulan-Mound earthquake. The inversion results show that the earthquake is a thrust type earthquake and the focal mechanism solutions are as follows: nodal plane I: strike 293 °, dip 44 °, slip angle 88 °; nodal plane II: strike 116 °, dip 46 °, slip angle 92 °. The optimal depth of rectangle is 15.7km, which is basically consistent with the results obtained by Institute of Geophysics, China Earthquake Administration and Harvard, indicating that the inversion result is reliable and reasonable.