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选用地方震尾波长度两水平分量的算术平均值与垂直分量之比τ_H/τ_ v作为参量,分析处理了库尔勒1978年4月22日5.8级地震前后库尔勒地震台65型地震仪所记录的104个地方震,以及库车1979半3月29日6.0级地震前后新源地震台维开克型地震仪所记录的128个地方震。取地震前几分钟噪声水平的两倍(毫米数)作为噪声带确定尾波的结止时间。所取地方震震中距Δ小于200公里,震级区间取0.7≤M_L≤4.5。结果表明,在库尔勒5.8级地震前一个多月库尔勒台的τ_H/τ_V出现了一定的低值变化,而在库车6.0级地震前利用新源台求出的τ_H/τ_V变化不太明显,略有异常显示。
The ratio of the arithmetic average of the two horizontal components of the local seismic wave length to the vertical component, τ_H / τ_ v, is chosen as the parameter to analyze and record the data recorded by the type-65 seismograph before and after the M 5.8 5.8 earthquake on April 22, 1978 in Korla Local earthquakes and 128 local earthquakes recorded by the Xinyuan Seismic Station before and after the March 6.0 earthquake on March 29, 1979. Twice (millimeters) the noise level a few minutes before the earthquake as the noise band to determine the ending time of the coda. Take the place where the epicentral distance △ less than 200 km, magnitude range taken 0.7 ≤ M_L ≤ 4.5. The results show that the τ_H / τ_V of Korla station appeared a little low value more than a month before the Korla M8.8 earthquake, while the change of τ_H / τ_V obtained by using the new source station before the M6.0 earthquake was not obvious Abnormal display.