唐山、松潘地震前视电阻率短临异常图象重现性

THE SHORT-TERM AND IMMEDIATE ANOMALOUS PATTERNRECURRENCES OF THE APPARENT RESISTIVITY BEFORE THE TANGSHAN AND SONGPAN EARTHQUAKES OF 1976

本文介绍了昌黎、武都两个地电台记录到的1976年唐山7.8级和松潘7.2级地震前视电阻率的短临变化特征。两个台站附近的地质、地电条件及台址基岩岩性均不相同,但在震前观测到的视电阻率曲线的变化都很相似,尤其是短临变化,无论是起始时间还是其变化率都比较一致。两次强震前观测到的视电阻率变化与岩石样品破裂实验的结果比较一致。事实表明,上述台站观测到的视电阻率短临前兆是真实的和可靠的。利用电阻率前兆手段,可以为预报类似唐山、松潘地震的无前震类型强震,提供临震前兆信息。

This paper introduces the observations at Changii, Hebei Province and Wudu, Gansu Province geoelectric stations (△≤100km) for two major earthquakes (Tangshan earthquake on July 28, 1976 and Songpan earthquake on August 16, 1976). The results of short-term and imme diate precursors were carefully checked and compared with each other. We got a similar precursory phenomenon which was not contingency. The similarity suggests that the similar anomalous phenomenon is objective; the electrical method (apparent resistivlty) is a hopeful methodfor earthquake prediction.