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研究了唐山地震周围２４０ｋｍ内１６个地电台及大同６．１级地震周围５０～６０ｋｍ内２个台地电记录的全过程，排除了干扰，在确定可靠前兆异常的基础上，研究了地电前兆场的分布规律，证明了地电前兆场与震源应力场之间存在物理联系，对比了同震电阻率变化符号分布与震源机制结果，表明同震电阻率变化与地电前兆变化符号相反，分布相似．因而认为唐山地震前后的地电观测表明，唐山地震是一个弹性回跳过程．提出了唐山地电前兆的虚错动模式，即设想地电前兆是由一个与地震时产生的实际错动符号相反的虚错动所产生的应变积累而引起的，结合所求得的１０￣（－７）～１０￣（－５）应变范围内放大系数Ｋ＝（△ρ／ρ）／ε的非线性特性，根据断裂力学理论，选取合理虚错动参数，计算了唐山地电前兆的理论分布．与实际地电前兆对比表明，半定量的理论值与实测值基本吻合，从而证明虚错动模式对唐山地电前兆是适用的．
The whole process of geoelectric recording of two stations within 50 ~ 60km around 240 earthquakes around the Tangshan earthquake and within 240km of the Datong-earthquakes was investigated. After eliminating the interference and determining the reliable precursor anomaly, the geoelectric precursors The distribution of the field shows that there is a physical connection between the geoelectric precursor field and the source stress field. Comparing the sign distribution of the crescent resistivity change with the result of the focal mechanism, it shows that the coseismic resistivity change is opposite to that of the geoelectric precursor sign, and the distribution similar. Therefore, the observation of the geoelectric power before and after the Tangshan earthquake shows that the Tangshan earthquake is an elastic bounce process. Proposed the imaginary virtual moving mode of Tangshan Earthquake precursors, that is, the assumption that the precursory geoelectric precursors is caused by the strain accumulation caused by the virtual error motion opposite to the actual misalignment sign generated by the earthquake. Combined with the calculated 10 ~ According to the theory of fracture mechanics, the reasonable virtual error parameter is selected, and the calculation result of the precursor of Tangshan geoelectricity is obtained. (7) The nonlinear characteristic of the amplification factor K = (△ ρ / ρ) / ε in the strain range of (-7) Theoretical distribution. Compared with the actual electric precursors, it shows that the semi-quantitative theoretical values are in good agreement with the measured values, which proves that the virtual wobbling mode is suitable for the precursor of Tangshan Electricity.