安徽地区尾波Q_c值特征研究  

Research on the Q_c Value of Anhui Area

作　　者：郑先进[1,2] 刘东旺[1,2] 沈小七[1] 刘泽民[1] 倪红玉[1,2] 李玲利[1,2] 

机构地区：[1]安徽省地震局,合肥230031 [2]蒙城地球物理国家野外科学观测研究站,安徽蒙城233500

出　　处：《华北地震科学》2011年第3期8-12,共5页North China Earthquake Sciences

基　　金：安徽省地震局重点基金项目(200605);中国地震局震情跟踪合同制定向工作任务(2010010201)

摘　　要：基于Sato单次散射模型,利用安徽省数字化测震台网2001年以来记录到的ML≥2.3级地震的波形资料,计算得到了安徽地区不同台站周围地壳介质的尾波Qc值,发现省内不同地区尾波Qc值存在着明显的差异,霍山地区尾波Qc值相对省内其余地区较低,拟合得到了安徽地区尾波Qc值与频率之间的依赖关系,为Qc=(104.9±36.4)f(0.85±0.08)。对安徽霍山地区2009年2—12月的震群序列尾波Qc值变化特征进行了分析,发现主震前后尾波Qc值发生显著的变化。Based on digital waveform data of ML≥2.3 earthquakes recorded by Anhui digital seismic network,the Qc value of the medium below seismic stations in Anhui area is calculated using the Sato single scattering model.The results show that the Qc value is inhomogeneous and much lower in Huoshan area.The formula for the relationship between Qc value and frequency in Anhui area is determined using curve fitting,which isQc=（104.9±36.4）f^（（0.85±0.08））.Particularly,the Qc value of Huoshan earthquake swarm sequences occurred from February to December of 2009 is calculated and analyzed, which shows significant difference between before and after the main shock.

关 键 词：尾波QC值 SATO模型 震群序列 延续时间 

分 类 号：P315.3[天文地球—地震学]