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地震总伴随着地磁场的变化.这是在理论和实践中都已确认了的事实.但是,从种类繁多且随机性很大的干扰磁场背景中,提取这种尺度和频率范围尚不清楚的微弱的地震磁异常讯息,却因其困难性很大尚无一种方法得到普遍的确认.我们知道,只有拿到真正的地震磁异常,才能谈得上“地磁报震”.因此,尽快地总结出一套排除干扰、突出地震异常的方法,是当前地磁工作者一项迫切的任务.现有日均值法、低点位移法、日幅差法、幅差二倍法、磁暴倍九法、红绿灯法等资料处理方法,然而这些方法是否能达到排除干扰、突出地震讯号的目的呢?我们认为,有些方法的某些部分还符合排除干扰的原理,能较好地突出地磁异常,但有不少部分却只是从经验出发,其运用方法与排
Earthquakes are always accompanied by the change of the geomagnetic field, which has been confirmed both in theory and in practice, however, it is still not clear from the variety and randomness of the disturbing magnetic field background that this scale and frequency range are not yet known Earthquake magnetic anomaly information, but because of its great difficulty there is not a way to get universal confirmation.We know that only get the real earthquake magnetic anomaly, can we talk about the “geomagnetic earthquake.” Therefore, as soon as possible to summarize A set of methods to eliminate the disturbance and highlight the earthquake anomaly is an urgent task for the present geomagnetic workers.The existing daily average method, low displacement method, the daily amplitude difference method, twice the amplitude difference method, nine times the magnetic storm method, However, whether these methods can achieve the goal of eliminating interference and highlighting seismic signals? In our opinion, some methods of some methods are in line with the principle of eliminating interference and can better highlight the geomagnetic anomalies, but not A small part is only based on experience, its use of methods and platoons