2004年甘肃临泽震群序列Q_C值特征研究

Study on the Q_C Value Characteristics for Sequence of Gansu Linze Swarm in June 2004

采用Sato单次散射模型,利用高台地震台的近场数字地震记录,研究了临泽震群序列尾波QC值在60s流逝时间下的变化特征,得到QC值随频率的变化关系QC(f)=(27.67±2.94)f(0.9924±0.0411)。分析发现:在中等地震频发时段,QC值变化起伏较弱且偏低;研究结果与民乐—山丹地震序列接近,故认为这个结果近似了祁连山地震带中段地区的介质特性。

By means of Sato scattering of single model and Gaotai seismic station of the near-field digital seismic re- cords, this paper studies the characteristics of Linze swarm sequence coda Qc value, also draws a conclusion of Qc value changing with frequency, which is Qc（f）=（27.67±2.94）f（0.9924＋0.0411）. Analysis found that during the period of frequent middle earthquake, ups and downs of Qc values is weak and Qc value is low; The results of this study is similar with the Minle-Shandan earthquake sequence. So we believe that this result is similar with the medium characteristics in the middle section of Qilian mountain.