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《Earthquake》 1990-04
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FEATURES OF EARTH RESISTIVITY ANOMALIES BEFORE DATONG-YANGGAO SWARM AND SHORT-IMPENDING PREDICTION

Wang Zhiliang Yu Surong(Center for Analysis and Prediction, SSB)  
This paper studies the data recorded at 22 geoelectric stations within the range of 500 km prior to the Datong-Yanggao Ms 6.1 earthquake. Only four geoelectric stations, e.i. 18.2% of the whole observed abnormal variations of earth resistivity before the earthquake. Due to the di-spersion of the positional distribution of the anomalous stations and unclearness of the short-impending precursory anomalies, it had been very difficult to give precise opinions on short-impending prediction before the event. However, some singificant precursory phenomena were observed after all before the shock. This again proves the importance of the earth-resistivity method as a precursory means for earthquake prediction.
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