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一前言我们曾对孕震区地震波传播的一些理论问题作过探讨。其初步结果表明,当地震波通过用两相介质模型所模拟的孕震区时,不仅传播速度要发生变化,而且波的振幅与形态(频潜或周期)都可能要发生相应的变化。本文将讨论孕震区地震波动力学特性变化的一个实例:1979年7月9日江苏省溧阳6级(Ms)地震。文中利用溧阳台记到的安徽省马鞍山铁矿近几年内上百次爆破的地震图记录资料对溧阳6级(Ms)地震前地震波动力学特性的变化
A Preface We have discussed some theoretical issues about seismic wave propagation in the seismogenic zone. The preliminary results show that when the seismic waves pass through the seismogenic zone simulated by a two-phase medium model, not only the propagation velocity should change, but also the amplitude and shape of the wave (frequency submergence or period) may change correspondingly. This article will discuss an example of the change of seismic wave dynamic characteristics in the seismogenic zone: the magnitude 6 (Ms) earthquake in Liyang, Jiangsu Province on July 9, 1979. Based on the seismogram records of hundreds of blasting records in Ma’anshan Iron Mine, Anhui Province, recorded by Liyangtai in the past few years, the change of seismic wave dynamic characteristics before the Ms6 earthquake in Liyang