【摘要】 利用Sato单次散射模型和九江台的近场数字地震记录,研究了九江-瑞昌地震序列尾波Qc值的变化特征,得到Qc值随频率的变化关系为Qc(f)=19.63±4.81f1.1838±0.0945。以2005年12月3日ML3.9地震为分隔点,序列早期时段地震的Q0值随时间的变化起伏较大,平均值相对较高,余震活动水平也较高;而序列后期时段地震的Q0值随时间的变化相对稳定,平均值相对较低,余震活动水平也较低,这种特征有可能意味着九江-瑞昌地震序列将逐渐转入平静时段。更多还原

【Abstract】 By use of single scattering model(Sato),the varying characteristics of Qc value of Jiujiang-Ruichang seismic sequence is studied from the digital earthquake record of Jiujiang station.The relation between the frequency and Qc value is Qc(f)=(19.63±4.81)f1.183 8±0.094 5.Before the 2005-12-03 ML3.9 earthquake,the Qc value changed obviously,the mean Qc value was higher,the aftershocks was more active;after this earthquake,the Qc value changed stably,the mean Qc value was lower,the aftershocks was not active.This feature is presumed that the Jiujiang-Ruichang earthquake sequence would come into the quiet state.更多还原