【摘要】 利用Sato单次散射模型和红山台的近场数字地震记录研究了邢台震区尾波QC值的变化特征,得到QC值随频率的变化关系:即窗长为15~30 s时QC=(42.9±20.7)f(0.98±0.13);窗长为40~60 s时QC=(103.1±27.9)f(0.85±0.08)。通过分析不同频率点随时间的变化曲线,发现2002年4月22日邢台隆尧5.0级地震前高频部分QC值出现"升高—降低—再升高—发震"的发震模式,对预测邢台地区的中强震的发生有一定的参考意义。还发现相对Aki模型而言Sato模型更适合邢台震区的尾波计算和分析。更多还原

【Abstract】 Using the Sato single isotropic scattering model and the near-field digital seismic records from Hongshan seismostation in Hebei province,the variation characteristics of S-code QC value in Xingtai seismic region are studied.The relationship between the QC value and frequency is obtained: while the length of windows are 15～30 s,QC=(42.9±20.7)f(0.98±0.13),and while the length of windows are 40～60 s,QC=(103.1±27.9)f(0.85±0.08).Through analyzing the variation curves of QC along with time in different frequency point,it is found that before Longyao ML 5.0 earthquake on April 22,2002,in Xingtai seismic region,the high-frequency part of QC value changed as "increasing→reducing→re-elevating→shocking" pattern,and this pattern has certain referent significance for moderate-strong earthquake prediction in Xingtai area.It is also found in the research that comparing with Aki model,the Sato model is better for the S-code computation and analysis in Xingtai seismic region.更多还原