波速异常（velocity anomaly of waves） 传播地震波的地下介质，受到拉伸或挤压时，会使通过它的地震波的传播速度发生变化，这种变化简称波速异常。
结果表明，应力途径和断层的存在是影响波速异常的两种可能因素。
It is shown that the stress path and the presence of faults are two possible factors influencing the anomaly of wave velocities.
采用与研究波速异常完全类似的方法，提出了利用振幅比异常预报较大地震的一些初步途径。
The method of earthquake prediction by means of amplitude relation anomalies is suggested, it is analogous to that by means of velocity anomalies.
相变对矿物和岩石的物理性质有重要影响，会导致电导率、弹性波速、热力学、流变学参数的异常和产生相变磁效应等。
It exerts an important influence on mineral physical properties, such as resulting in the abnormalities of conductivity, elastic wave velocity, thermodynamics and magnetic effect and so on.
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