采用CAP方法反演2014年1月18日河南范县ML 4.2地震震源机制,反演结果显示:震源矩心深度在9 km处获得最佳震源机制解,其中:矩震级MW=4.0;节面Ⅰ:走向66°,倾角83°,滑动角-171°;节面Ⅱ:走向335°,倾角81°,滑动角-7°.同时采用P波初动和Snoke方法求解,发现震源机制解与CAP方法一致.初步推断此次地震的震源机制解属于走滑型,节面Ⅰ为NE走向,与该区内聊兰断裂方向一致,推测此地震应与聊兰断裂活动相关.%Inverting the ML 4.2 earthquake focal mechanism solution in Fanxian county, Henan Province in 2015.1.18 by CAP method, we come to conclusions: The optimum focal mechanism solution was gained at the focus depth of 9 km, and the moment magnitude (MW) is equal to 4.0. One pitch surface's strike is 66 degree and its dip is 83 degree and its slide angle is -171 degree. Those of the other pitch surface are 134.9 degree, 81.1 degree and -7.1 degree. The data reveal that both belong to strike-slip fault which is as well the result of P-wave first motion method and Snoke method. The strike coincides with the direction of Liao-Lan fault in this region, implying certain correlation between earthquake and Liao-Lan fault activity.
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