摘要
基于单次散射模型,利用山东数字地震台网数字地震波形资料,计算了山东地区13个频段的Qc值。结果表明,在1.0-20Hz(短周期)或0.05-20Hz(宽频带)频率范围内,Qc值随频率的变化近似服从幂函数关系Qc=Q0fη,拟合得到山东地区尾波Qc值随频率的变化关系为Qc(f)=118.7±26.8f0.94±0.14,并且选取的流逝时间越长,即时间窗越靠后,Qc值一般也越大。
Based on the digital waveform data recorded by Shandong Digital Seismic Network, the Qc values of coda wave in 13 frequency bands in Shandong area are calculated with single scattering model. The results show that the variation of Qc with frequency obeys approximately power function Qc = Q0f^η in the range of 1.0-20Hz （short cycle） and 0.05 - 20Hz （wide - band）, and it is determined as Qc（f） = 118.7 ＋ 26.8f^0.94±0.14 through fitting. The longer the time, the bigger the Qc value.
出处
《华北地震科学》
2008年第1期8-12,共5页
North China Earthquake Sciences
关键词
单次散射
尾波QC值
时间窗
山东
Single scatter
Qc value of coda
Time window
Shandong
