摘要
利用S波分裂方法的基本理论及计算方法,重点研究了皖北地区具有代表性的利辛张村附近周边地区25 km内,自1999年蒙城地震台数字化测震仪器正式记录以来至2010年9月,M_L2.0及以上地方震的单台地震波形,利用有关S波分裂方法进行处理,得到该地区不同时段的S波的偏振方向及延迟时间,为皖北地区地震活动性研究及应力活动状态提供地下介质的地球物理信息。
Using the basic theory and calculation method of S wave splitting method, the digital waveform data of ML≥2.0 local earthquakes occurred in a region surround Lixin Zhang vil- lage within 25 km, where is representative in northern Anhui region, which recorded by Mengcheng Seismic Station from its officially operating in 1999 to Sep 2010, are processed. The S wave polarization direction and delay time in different time are obtained. The results provide valuable geophysical information for the study on seismic activity and stress activity state in northern Anhui region.
出处
《地震地磁观测与研究》
2011年第6期56-61,共6页
Seismological and Geomagnetic Observation and Research
基金
"野外战"壳幔物质与环境领域相关项目基金资助
关键词
S波分裂
利辛地震
各向异性
偏振方向
延迟时间
S wave splitting, Lixin earthquake, anisotropy, polarization direction, delay time
