STUDY ON THE INFLUENCING FACTORS FOR THE RECENT VARIATIONOF THE EARTH RESISTIVITY IN CHANGLI SEISMOSTATION

Based on the investigation to the environment of the Changli Seismostation,its electromotive profile and its resistivity of well water,The reasons and the process of the earth resistivity's variation in the station are analyzed.The results show that the main reasons of the earth resistivity's reduction is the combining effect of the diffusion of hot mineral water,the vadose of waste water around the station and rain.