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本文介绍临震电磁波发射现象的多频段观测试验,观测仪器所选用的工作频段为超低频、低频、甚低频、中频和高频五挡,在较高的频段上以点频接收为主,而在较低的频段上以宽带接收为主,信号处理方式一般为幅度解调与积分放大相结合,笔绘出信号的包络。1983年11月7日山东菏泽5.9级地震前,江苏弶港与南渡电磁信息多频段观测仪器的高灵敏度接收道记录到一系列特殊波形,文章详细介绍了这一观测结果,对其波形与信号特征进行了分析讨论。
This paper introduces the multi-band observation experiment of the phenomenon of electromagnetic emission near the earthquakes. The working frequency bands selected by the observing instruments are ultra-low frequency, low frequency, very low frequency, medium frequency and high frequency five gears, and receive the point frequency in the higher frequency band. In the lower frequency band to receive the main broadband, signal processing is generally amplitude demodulation and integral amplification combined pen plot the envelope of the signal. Before the MS 5.9 Heze earthquake in Shandong Province on November 7, 1983, a series of special waveforms were recorded on the high-sensitivity receiving channels of the multi-band observatory of the electromagnetic waves of Nangdu and Nandu, and the results of this observation were introduced in detail. Signal characteristics were analyzed and discussed.