关于压磁效应和膨胀磁效应

在简化条件下, 估计了压磁效应的可能量级.由此推知, 在非磁异常区, 地震前后的磁场变化不一定是压磁效应引起的.压磁效应不是震磁关系的唯一机制.按照渗滤电流理论推出的公式表明, 由地下水渗滤作用引起的所谓膨胀磁效应也是很小的.只有渗滤区足够大, 地下水剧烈运动, 才有可能观测到膨胀磁效应.

ON THE PIEZO-MAGNETIC EFFECT AND DILATANCY-MAGNETIC EFFECT

Under simplified conditions, an estimate of the probable order of magnitude of the piezo-magnetic effect has been made. It follows that magnetic field variations observed before asd after an earthquake is unlikely caused by piezo-magnetic effect in not magnetically anomalous areas. Piezo-magnetic effect is not the only factor giving rise to the variation of the geomagnetic field in connection with the occurrence of earthquakes.The formulas derived from the theory of diffusion current show that the so-called dilatancy-magnetic effect caused by ground water diffusion is also very small. If the area of ground water diffusion is sufficiently large and the movement of water is very rapid, the dilatancy-magnetic effect may be detected.