Daily change characteristics of hour by hour value of ground resistivity observed at Lanzhou geoelectric station are analysed. The results show that a stabler background value exists in mean daily change of hour by hour value a month or a year of ground resistivity. The background value can be regarded as a basis judging short-impending anomaly of daily change of hour by hour value of ground resistivity.
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强科瑜.兰州地电台地电阻率逐时值日变化分析[J].地震工程学报,1999,21(3):321-325. QIANG Ke-yu. ANALYSIS ON DAILY CHANGE OF HOUR BY HOUR VALUE OF GROUND RESISTIVITY OBSERVED AT LANZHOU GEOELECTRIC STATION[J]. China Earthquake Engineering Journal,1999,21(3):321-325.