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目前美、苏、日、西欧等国正在活跃地开展震源物理过程的野外、实验室和理论研究。地震孕育期间的岩石膨胀和液体扩散现象就是其中的一类。膨胀和扩散过程在震源附近造成许多表现形式不同的物理效应。例如岩石力学实验和野外观测均已证实处于应力作用下直到破裂之前电阻率发生较大的变化。在电弹性模型中这与岩石的电致伸缩和压电效应是有关系的。研究一定压力和温度下岩石电性的变化一
Currently, the United States, the Soviet Union, Japan, Western Europe and other countries are actively carrying out the source of physical processes in the field, laboratory and theoretical research. One of them is rock expansion and liquid diffusion during earthquake gestation. The expansion and diffusion processes cause many different forms of physical effects near the source. For example, rock mechanics experiments and field observations have confirmed that there is a large change in resistivity under stress until rupture. In the electro-elastic model, this is related to the electrostrictive and piezoelectric effects of rocks. Study of a certain pressure and temperature changes in rock electrical properties of a