唐山地区尾波Q值时空分布特征

摘要

利用首都圈地震数字台网2009年1月至2016年3月记录的地震波形资料,采用Sato尾波单次散射模型,固定尾波窗长,计算唐山地区尾波Q值,时间和空间上分析Q值分布特征,结果显示,Q值在空间分布上呈现明显的横向不均匀性,在较长孕震时间上呈现降低—升高—降低—发震的过程,且中强震易发生在Q值高低值交界区偏高值—侧,震群易发生在Q值相对较低区域.%The coda wave Q values in Tangshan region is calculated by fixed the window length of the code wave based on Sato single scattering model,using the seismic waveform data recorded by the Digital Seismic Network in Capital Circle from January 2009 to March 2016.The distribution characteristics of Q values were analyzed in time and space,respectively.The results show that,the spatial distribution of Q values show significant lateral heterogeneity,Q values exhibit the process of increasing-reducing-re-elevating-shocking over a longer earthQuake preparation time,and the moderate earthQuake tends to be happened in the side of high values of the border zone of high and low Q values,the earthQuake swarm tends to be happened in the region where Q values are relatively low.