江苏地区尾波Q值特征研究  

Characteristics of Coda Wave Q Values in Jiangsu Area

作　　者：孙业君[1] 黄耘[1] 王斌 王俊[1] 李锋[1] 江昊琳[1] 

机构地区：[1]江苏省地震局,江苏南京210014 [2]盐城地震台,江苏盐城224000

出　　处：《地震》2014年第1期24-33,共10页Earthquake

基　　金：江苏省科技支撑-社会发展项目(BE2011814)

摘　　要：基于Aki单次散射模型,利用江苏数字地震台网记录的地震数字波形资料开展了江苏地区尾波Q值特征研究。结果表明,江苏地区总体上属于高Q值地区,但不同地区存在明显差异,总体呈现出南高北低的特点。本文对台站相对较密、地质构造特点明显、尾波Q0计算结果较为集中的四个区域分区进行了研究,获得了江苏四个区域的Q值与频率的特征关系。苏南至长江口和茅山断裂带附近为江苏的高Q值地区,苏中至沿岸为低Q值地区,苏北连云港及附近处于Q值中等水平地区。对照江苏四个Q值不同分区的构造及地震活动分析,Q值、地壳运动和地震活动性之间存在一定的相关关系。Based on single scatter model, using earthquake waveform data recorded by Jian- gsu earthquake networks, coda wave Q values in Jiangsu area was calculated. The results show that, Q values in Jiangsu area is high overall, but there exist obvious differences in different areas. The Q value in the south is higher than the north. We respectively studied four areas where seismic stations are relatively intensive, the character of geological struc- ture is evident and coda wave Q0 is relatively focused, and obtained the characteristic rela- tionships between Q values and frequency of the four areas in Jiangsu. Q value in the south of Jiangsu to Maoshan fault zone is much higher than other areas, and Q value is lower in the central part of Jiangsu to the coastal areas. Q value is in the middle level in the north and in the neighbourhood of Lianyungang. Comparing tectonic and earthquake activities in the four areas shows that there is a relationship among Q values, crustal movement and earthquake activity.

关 键 词：尾波Q值 衰减 Aki单次散射模型 江苏地区 

分 类 号：P315.7[天文地球—地震学]