论文部分内容阅读
利用新疆地震台网吉根单台所记录的阿克陶M_S6.7地震发生前后的数字地震波形资料,采用Aki、Sato等两种单次散射模型,系统地研究了该次地震序列尾波Q值随时间的变化,分析了尾波Q值在强震前后的变化特征。两种模型拟合Q_C与对应频率之间的关系表达式为Q_C=110.5±35.37f1.192±0.235,Q_C=60.85±14.78f0.975±0.088,阿克陶地震序列计算得到Aki和Sato模型的Q_C值都相对较低,该地区是以高η值、低Q_C为特征的构造活跃区。根据2012年1月至2017年1月吉根台记录的数字波形尾波Q值时序进程特征表明,地震序列前的Q_C值的变化特征为上升—下降—持续—发震的趋势。
Using the digital seismic waveform data recorded before and after the Aqetu M_S6.7 earthquake recorded by the single station of Jigen, Xinjiang Seismological Bureau, two kinds of single scattering models, Aki and Sato, are used to systematically study the Q value of the tail wave Time, the change of coda Q value before and after strong earthquakes is analyzed. The relationship between the two models fitting Q_C and the corresponding frequency is Q_C = 110.5 ± 35.37f1.192 ± 0.235 and Q_C = 60.85 ± 14.78f0.975 ± 0.088. The Aki and Sato models Q_C values are relatively low, the area is characterized by high η, low Q_C characterized by tectonic activity area. According to the characteristics of the Q waveforms of Q waveforms recorded at the Ji’guang station from January 2012 to January 2017, the Q_C values before the earthquake sequence are characterized by a rising trend, a decreasing trend and a continuous rising trend.