摘要
本文对DPJ和ULF型地震电磁辐射观测仪观测场量的主要特征进行简单的理论分析,并综合国内各地观测资料,初步探讨了电磁辐射方法在短临预报应用中有关时、空、强的前兆判据问题:1.电磁辐射异常信号的弱-强-弱-平静-发震的变化过程中,多点位异常时间趋于集中之后的信号减弱甚至平静,可能是数十小时内发震的一种标志。2.目前所观测到的地震电磁辐射信号主要来自震源(或震中)方向。3.利用lgT-M关系曲线能在一定程度上定量估算未来地震的强度。
In this paper simple theory analysis is provided for main characteristics of field quantity observed with the DPJ and ULF types electromagnetic radiation-meters for earthquakes.Generalizing domestic data,three time-space-strength criteria of application of electormagnetic method to the short-imminent earthquake predic- tion are preliminarily discussed:1)It is possibly a mark of occurring earthquake in future 10 hours that electromagnetic emission signals weaken,and even quiet after the anomalous time of multipoint tend to concentrate when the signals variate with the process of weakness-strongness-weakness-quietness;2)The electromagnetic emission signals of earthquakes observed at present mainly come from the direction of focus or epicentre;3)It is possible that the strength of future earthquakes are esti- mated to some extent using the relation of lgT-M.
出处
《地震学刊》
CSCD
1992年第4期1-7,共7页
Journal of Seismology
关键词
地震
电磁辐射
地震前兆
quasi-static field
preearthquake quiet
transmitting loss
anomalous duration time
