腾冲地震台数字地震记录S波分裂研究  

Study on the Shear Wave at Tengchong Seismic Station

作　　者：毛慧玲[1] 秦嘉政[1] 

机构地区：[1]云南省地震局,云南昆明650224

出　　处：《地震研究》2011年第4期494-497,共4页Journal of Seismological Research

基　　金：云南省基金重点项目"青藏高原东缘强震活动规律与板缘动力学机制(2010CC006)";云南省十项措施"地球物理场和化学场动态变化与强震活动关系研究(JCYB-20080601-5)"联合资助

摘　　要：对2000～2010年腾冲地震台数字地震资料进行S波分裂研究,得到了腾冲地区不同时间段内的应力优势方向和S波延迟时间。结果表明,其快波偏振方向主要集中在NE30°～55°,这与该区的主应力场方向基本一致。横波分裂延迟时间能为地震预报和区域应力场研究提供有用的信息。Using the digital data from 2002 to 2010 recorded by Tengchong Seismic Station, we conducted a shear wave splitting and obtained the predominant direction of stress and the delay time of shear wave in different stages from 2002 to 2010 in Tengchong. Further, we found that the predominant polarization direction was in NE30° -55°, agreeing with the one of the regional principal compressive stress. The delay time of the shear wave provides useful information for the study of the regional stress field and the earthquakes prediction.

关 键 词：横波分裂 裂隙各向异性 延迟时间 腾冲地区 

分 类 号：P315.31[天文地球—地震学]