摘要
基于Aki单次散射模型,利用八盘水磨台和西克尔台记录的伽师M_(s)6.4地震序列的数字地震波形资料,计算八盘水磨台和西克尔台的尾波Q_(c)值以及M_(s)6.4地震序列的尾波Qc值,分析并讨论了上述2个台站尾波Qc值的时间变化特征及与强余震的关系。结果显示:八盘水磨台、西克尔台和伽师Ms6.4地震震源区的拟合平均尾波Q0值分别为269.8,272.5和267.2;平均η值分别为0.75、0.72和0.74。八盘水磨台和西克尔台尾波Q_(c)值随时间变化特征显示2020年2月21日M_(s)5.1余震前,尾波Qc值出现"低值-高值-发震"的现象,这一现象可为后续该区M_(s)6.0地震的强余震判定提供一定的参考。
Based on AKI single scattering model,using digital seismic waveform data of Jiashi M_(s)6.4 earthquake sequence recorded by BPM station and XKR station,the coda Q_(c) of M_(s)6.4 earthquake sequence are calculated.The time variation characteristics of coda Q_(c) of the above two stations and their relationship with strong aftershocks are analyzed and discussed.The results show that the fitting average coda Q_(0) of BPM station,XKR station and Jiashi Ms6.4 earthquake focal area are 269.8,272.5 and 267.2 respectively;the average η were 0.75,0.72 and 0.74,respectively.The time-varying characteristics of coda Q_(c) at BPM station and XKR station show that before M_(s)5.1 aftershock on February 21,2020,coda Q_(c) appears to be a low-high-earthquakeM,which can provide a certain reference for the determination of strong aftershocks of subsequent M_(s)6.0 earthquakes in this area.
作者
郭寅
刘建明
GUO Yin;LIU Jian-ming(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2021年第3期216-222,共7页
Inland Earthquake
基金
新疆维吾尔自治区自然科学基金(2020D01A84)
2019年度震情跟踪定向工作任务(青年)(2019010128).
