鲁豫交界地区尾波Qc值分析研究

Analysis on Qc Value of Coda in the Boundary Area between Shandong and Henan Province

摘要:

该文对濮阳台记录的21次地震进行了地震波衰减研究，讨论了地球介质品质因子随频率变化的关系；利用不同地震采用不同流逝时间的尾波品质因子测定方法，有效去除了由于不同地震或同一地震的地震散射波在纵向介质中穿透深度的不同而导致对品质因子测量结果的影响，从而有利于扑捉到品质因子的异常变化特征与地震孕育过程的关系。利用改进后的模型，对鲁豫交界地区尾波值进行了计算，得到了该地区品质因子随频率的变化关系和区域介质衰减的时间变化特征。

Abstract:

According to previous research results of 21 times seismic wave attenuation earthquake records in Puyang station, the relationship between the quality factors accompanying with versus frequency is discussed. Different earthquakes are determined by using different wave quality factors. It can eliminate the impact of the quality factors measurements caused by the earthquake seismic wave scattering in the vertical penetration depth at the same or different earthquakes. It will help to capture the relationship between the abnormal changes characteristics of the quality factors and the earthquake preparation process. By using the improved model, coda wave Qc value of boundary between Shandong and Henan province is calculated, then the relationship of quality factors with frequency attenuation and the temporal changes of the regional media attenuation is gained as well.