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本文为了从区域地震的尾波中提取强震的前兆信息,试以江苏溧阳1979年7月9日6.0级地震前后的一系列安徽马鞍山爆破资料为基础,探讨了二个固定台站上的纪录尾波中,强震以前尾波走时持续时间特性、频率随时间的变化特性及振幅衰减特性等的变化情况,可以看到三者基本上一致同步变化,且在目前的观测和分析水平上,分辨不出途径的影响。本文叙述了这三个特征量的测定方法,并对分析结果作了定性的物理解释。
In order to extract the precursory information of strong earthquakes from the coda of regional earthquakes, based on a series of data of Ma’anshan blasting in Anhui before and after the MS 6.0 Ms 6.0 on July 9, 1979, the records of two fixed stations were discussed In the wake wave, the characteristics of the duration of the tail wave travel time before strong earthquakes, the variation characteristics of the frequency with time, and the amplitude attenuation characteristics, we can see that the three are basically in synchronous changes. At the current level of observation and analysis, Can not tell the impact of the route. This paper describes the determination of these three characteristics of the amount of quantitative analysis of the results and made a qualitative physical explanation.