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1.震前电磁波异常的观测据有关研究,震前辐射的电磁波频谱很宽,从超极低频到超高频都可能存在。因此,观测震前电磁波异常最好采用多频段接收方式。但是目前我们只能接收某频段的电磁波。一般测点都远离震中,因此,采用低频甚至超低频观测系统是比较合适的。我们使用GCI-1A型磁场传感器作接收天线,与DJ-1型地震仪配合。这种传感器是采用一种高导磁
1. Abnormal electromagnetic wave before the observation According to the study, the electromagnetic spectrum before the earthquake radiation is very wide, from ultra-low frequency to ultra-high frequency may exist. Therefore, it is best to use multi-band receiving method to observe the anomalies of electromagnetic waves before earthquakes. But for the moment we can only receive electromagnetic waves from certain frequency bands. General measuring points are far from the epicenter, therefore, the use of low frequency or even ultra-low frequency observation system is more appropriate. We use the GCI-1A magnetic field sensor as the receiving antenna, and DJ-1 type seismometer with. This sensor uses a high permeability