江苏地区地磁变化和三个5级以上的地震磁效应

自1979年以来,江苏地区地磁总强度和垂直分量台网已进行了十年的观测和试验.在上述时间内共获得三个5级以上的地震磁效应.十年观测结果表明,本区在没有发生5级以上地震的期间,地磁垂直分量也未出现过异常变化.本文认为,在中低纬度地区,用较密集的连续观测垂直分量台网来捕捉地震磁异常,有可能改善地磁方法预报5级以上地震的效果和作用. 

GEOMAGNETIC FIELD VARIATIONS AND THE GEOMAGNE- TIC EFFECT OF THREE M-OVER-5 EARTHQUAKES (Ms>5.0) IN JIANGSU PROVINCE

Since 1979 repealed observations and experiments of geomagnetic total intensity and its vertical component have been carried out for ten years at the geomagnetic network which is located over Jiangsu Province. In this period the geomagnetic effects of three earthquakes were observeted. The observation results show that no anomalies of the vertical component of geomagnetism have been observed as long as earthquake of Ms>5.0 have not occurred.In this paper, it is suggested that a dense network for continuous observation of the vartical component of geomagnetism may catch geomagnetic anomalies associated with earthquakes of M>5, and this may improve effectiveness of earthquake prediction by geomagnetic observation at mid-or-low latitudes locations.