江苏地区尾波Q值特征研究

摘要/Abstract

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。

关键词: 尾波Q值, 衰减, Aki单次散射模型, 江苏地区

Abstract: Based on single scatter model, using earthquake waveform data recorded by Jiangsu 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 structure is evident and coda wave Q₀ is relatively focused, and obtained the characteristic relationships 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.

Key words: Coda wave Q value, Attenuation, Single scatter model, Jiangsu area

中图分类号:

P315.7

孙业君, 黄耘, 王斌, 王俊, 李锋, 江昊琳. 江苏地区尾波Q值特征研究[J]. 地震, 2014, 34(1): 24-33.

SUN Ye-jun, HUANG Yun, WANG Bin, WANG Jun, LI Feng, JIANG Hao-lin. Characteristics of Coda Wave Q Values in Jiangsu Area[J]. EARTHQUAKE, 2014, 34(1): 24-33.

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