中文摘要：

研究了大地电场变化的基本要素,对嘉峪关地电场观测资料的质量进行了评价和分析,得到：嘉峪关台地电场观测基本反映了地电场的真实变化,特别对大地电场变化的记录准确。并研究了嘉峪关台附近及周围发生的4次中强地震前地电场、大地电场短临前兆现象,认为震前都显示了一定的短临异常。

英文摘要：

The quality of the observed data of geoelectric field from Jiayuguan station is analyzed and appraised in six aspects,and the basic factors of geoelectric field change are discussed.The result shows that the data of Jiayuguan station have reflected the real change of earth electric field,and the records are accurate.The short-term and imminent precursors in the geoelectric field and telluric data before 4 times moderate and strong earthquakes occurred near Jiayuguan station are studied.It is considered that before moderate-strong earthquake there are some short and imminent anomalies in the geoelectric field data.