土地电作为予报地震的手段,巳经在全国各省、市、县普遍采用,成了全国密度大分布广的专群结合的震情监视网。几年来它在予报地震方面,起到了一定作用,也找到了一定规律和经验。但是各地所处地点的地质环境不同和布设方式的差异,所得经验难能普遍适用,尤其缺乏现象与理论的联系,使得一些经验公式不能进一步分析判断其正确与否。而在一些刊物中更少论及予报震中方向 As a means of reporting earthquakes, terrestrial electricity has been widely adopted in various provinces, cities and counties across the country and has become the national earthquake monitoring network with a large population of densely populated areas in China. In recent years, it has played a certain role in reporting earthquakes and has also found certain laws and experiences. However, the geological environment at different places and the difference in the way of arrangement, the experience can hardly be universally applicable, especially the lack of connection between the phenomenon and the theory, so that some empirical formulas can not be further analyzed to determine its correctness or not. In some publications, however, it is less concerned with reporting the epicenter