临震电磁波信息研究

临震电磁波辐射与电磁扰动的现象,早在1966年邢台地震时就引起了人们的注意。1975年海城地震和1976年唐山大震后,一些单位从不同的方面开展了观测研究工作。我省一些中强震震前也曾出现过不同表现形式的电磁波辐射与电磁扰动现象。如1970年10月29日金湖4.2级地震前约2小时,震中区一鱼场工人发现收音机受到强烈干扰,震后即恢复正常;1974

THE STUDY OF THE ELECTROMAGNETIC WAVES INFORMATION DURING THE APPROACHING OF THE EARTHQUAKES

During the period before and after the earthquake of magnitude 6.0 occurred on July 9, 1979 in Liyang, Jiangsu province, the observational station of electromagnetic waves in Nanjing(epicenter distance about 80 km)indicated the following three types of waves:1. The electromagnetic, waves arising at the early stage before the earthquake are called waves type A;2. The electromagnetic waves arising in the form of wave train before the approaching of the earthquake are called waves type B;3. The electromagnetic waves arising after the earthquake characterizing both A and B are called waves type AB.All sorts of the phenomena indicated that the characteristics of the electromagnetic waves arising during the approaching of the earthquake are:the nearer the occurrence of the earthquake approached, the higher the frequency of the electromagnetic waves. Moreover, the frequency spectrum of the electromagnetic wave sappeared to be wider than it is known today. In the continued duration in which the electromagnetic waves were arising, the group number of the wave train reached the peak value.