岫岩5.4级地震前震源参数与地震波异常变化  

Abnormal characteristics of source parameter and seismic wave before Xiuyan MS 5.4 earthquake

作　　者：张萍[1] 邹向荣[2] 仇小丽 

机构地区：[1]辽宁省地震局,中国沈阳110031 [2]朝阳地震台,中国辽宁122000 [3]岫岩地震台,中国辽宁118400

出　　处：《地震地磁观测与研究》2008年第2期7-13,共7页Seismological and Geomagnetic Observation and Research

摘　　要：通过搜集辽宁地震台网1997～2004年8个台站记录的ML≥2．5地震观测资料，结合前期工作，对岫岩5．4级地震前后地震波特征进行了分析。结果表明：在岫岩5．4级地震前，P波初动、P波和S波振幅比、小震综合节面解及岫岩ML≥4．0地震震源机制解等同时出现明显的变化。Collecting the data of earthquakes that ML≥2. 5 happened between 1997 and 2004 from 8 terminal stations of Liaoning earthquake network, we make an analysis of the characteristics of seismic wave before and after the Xiuyan Ms 5. 4 earthquake along with former work. From the data, we can conclude that the first motion, the amplitude ratio, the synthetic focal mechanism solutions of small earthquakes and focal mechanism solution of ML≥4.0 all have abnormalities before the Ms 5.4 earthquake.

关 键 词：地震波 振幅 矛盾符号比 岫岩地震 

分 类 号：P315.72[天文地球—地震学]