【摘 要】
:
依据尾波衰减特征,采用测量尾波包络体最大双振幅方法,分别用单次散射和多次散射模式处理了苏、皖、鲁、冀四省42个DD-1台站,51个地震的尾波资料,求出与散射有关的地球介质Q因子,并对Q值随尾
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依据尾波衰减特征,采用测量尾波包络体最大双振幅方法,分别用单次散射和多次散射模式处理了苏、皖、鲁、冀四省42个DD-1台站,51个地震的尾波资料,求出与散射有关的地球介质Q因子,并对Q值随尾波推移时间窗、震中距的变化进行归一法处理,公式如文中式(11)、(12),用归一法求得的多次散射模式Q02值分布图象表明,高Q值与中强地震的活动背景有关,这种简易测定地球介质Q值的方法在地震前兆分析中有着良好的应用前景
According to the coda attenuation characteristics, 42 DD-1 stations in Jiangsu, Anhui, Shandong and Hebei provinces were treated by single scattering and multiple scattering modes by measuring the maximum double amplitude of the coda envelope. 51 earthquakes , The Q factor of the medium related to scattering is obtained, and the Q value is normalized with the variation of the Q value with the time window and the epicenter distance of the waviness. The formulas are as follows: (11), (12) The Q02 value distribution of the multiple scattering mode obtained by the normalized method shows that the high Q value is related to the active background of the moderately strong earthquakes. This method of simply measuring the Q value of the Earth’s medium has a good application prospect in the analysis of earthquake precursors
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