震前磁场出现短周期快速变化时,会相应地产生感生电动势,检测震前可能存在的这种电磁感应效应信息,用于临震预报很有意义。 我们从地震前微波通讯异常、岩石破裂和动物异常试验得到启示,震前可能存在电磁波前兆。因而研制成CG-1型磁场感应仪,在云南省丽江地震台做试验,收到一定效果。 When the short-period magnetic field changes rapidly, an induced electromotive force will be generated accordingly. This electromagnetic induction effect information that may exist before the earthquake may be detected. It is very meaningful for the prediction of the imminent earthquake. We have enlightenments from the anomalies of microwave communication before earthquakes, rock failure and animal anomalies, and there may be precursors of electromagnetic waves before the earthquake. Thus developed CG-1-type magnetic field sensor, Lijiang, Yunnan Province, to do the test station, received a certain effect.