解析计算法与吴尔夫网投影法求解震源机制结果比较  

Comparison of the focal mechanism solution based on analytical calculation method and Wolf′s net projection

作　　者：张萍[1] 蒋秀琴[1] 高艳玲[2] 谷光裕[1] 吴野[1] 

机构地区：[1]辽宁省地震局,辽宁沈阳110031 [2]中国地震局分析预报中心,北京100036

出　　处：《地震》2003年第4期43-48,共6页Earthquake

摘　　要：利用"基于GIS地震分析预报系统"提供的用地震初动符号求震源机制解软件,获得了1999年11月辽宁岫岩—海城交界地区20个ML≥4.0地震的震源机制解,并将求解结果与采用吴尔夫网投影法得到的震源机制结果进行比较。结果表明,二种求解震源机制得到的节面(A、B)、力轴(P、T)比较接近,对应效果比较好。According to the initial motion signs of earthquakes, which was provided by the focal mechanism software in 'earthquake analysis and prediction system based on GIS', the authors have obtained the focal mechanism solutions of 20 earthquakes with M_L≥4.0 in boundary region of Xiuyan-Haicheng in Liaoning province on 29th November 1999. And a comparison study is conducted with the focal mechanism solution, which was made by Wolf's net projection method. It is shown that the nodal plane (A, B) the stress axes (P, T), provided by two methods are almost same. The corresponding is good.

关 键 词：解析计算法 吴尔夫网投影法 震源机制 P波 空间分布 地震初动符号 

分 类 号：P315[天文地球—地震学]