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地电阻率法是地震预报前兆方法中的一个重要手段。然而近二十年来,一直用地球物理勘探中用于找矿的DDC-2系列仪器进行地电观测。 地电前兆观测与地震前兆观测一样,都是从强干扰背景中提取弱的震兆信息。但由于上述仪器无法排除各种强干扰,使观测精度受到一定影响,因此决定研制新的地电仪。ZD-8地电仪是国家地震局兰州地震研究所在总结了多年地电观测的经验和多种地电仪器的优缺点
Earth resistivity method is an important method in the earthquake prediction method. However, for the past two decades, the DDC-2 series of instruments used for prospecting in geophysical prospecting have been geographically observed. Geoelectric precursory observations, just as seismic precursory observations, extract weak earthquake mellitus information from strong interference backgrounds. However, due to the above-mentioned instruments can not be ruled out a variety of strong interference, so that the accuracy of the observation be affected, it decided to develop a new geoelectric instrument. ZD-8 earth electrical instrument is the Lanzhou Seismological Institute of the State Seismological Bureau in summing up years of experience in geoelectric observation and a variety of advantages and disadvantages of geoelectric instruments