山西省部分台站下方S波速度结构研究及与地震关系探讨  

STUDY ON S WAVE VELOCITY STRUCTURE UNDER PART STATIONS IN SHANXI PROVINCE

作　　者：张学民[1] 束沛镒[2] 刁桂苓[1] 

机构地区：[1]河北省地震局 [2]中国科学院地质与地球物理研究所,中国北京100029

出　　处：《地震学报》2003年第4期341-350,共10页Acta Seismologica Sinica

基　　金：国家重点基础研究发展规划项目<大陆强震机理与预测>(G19980 4 0 70 5 )资助

摘　　要：收集山西省数字台网记录的深源远震S波 ,采用S波理论波形拟合的方法 ,获得了山西省境内共 6个台站下方的剪切波速度结构 .结果显示 ,该省区域内地壳厚度普遍较厚 ,其中 4个台站地壳厚度均在 4 0km以上 ;同时地壳均为高低速层相间结构 ,且不同地区的台站呈现不同的速度结构特征 ,同一构造区域周围的台站显示了区域相似的特点 .最后 ,结合多次中小地震的优势深度层位 ,讨论了多震层与高低速层结构的相关性 .Based on S wave records of deep teleseisms on Shanxi Province Digital Network, and by modeling S wave waveform, shear wave velocity structures under 6 stations were obtained. Generally, the result shows that the crust is thick in the studied region, and it is up to 40km in thick under 4 stations. The velocity layers are all alternatively high and low. The different stations show varied velocity structure, however, stations surrounding a same tectonic region show similar structure characteristics. Combined with dominant depth distribution of many small medium earthquakes, we also discuss the correlation between seismo active layers and structures of high and low velocity layers.

关 键 词：山西 S波 波形拟合 速度结构 低速层 多震层 剪切波 地震波 

分 类 号：P315.31[天文地球—地震学]