新沂地震台地电阻率变化与江苏邻近地区的中强震关系的研究

Research on the relation between earth resistivity anomalies at Xinyi Seismic Station and moderate-strong earthquakes in Jiangsu Province

运用速率法、滑动傅氏对新沂地震台(以下简称新沂台)1990～1999年地电阻率观测资料进行了分析,1994年到1997年之间江苏及邻近地区发生的中强震,新沂台地电阻率3个测向有不同程度的异常与之对应。研究结果表明资料异常呈现的各向异性与孕震期的应力状态、震区构造、介质结构有关。表明了前兆异常的复杂性、多样性。

Analysis about earth resistivity tion with the velocity method and observation data from 1990 to 1999 Fourier slipping method, resistivity at Xinyi Seismic Staanomalies appeared in all three components at Xinyi Seismic Station in different degree before medium-strong earthquakes accrued in Jiangsu from 1994 to 1997. The result shows that the anisotropy of resistivity anomalies is related with earth rotation acceleration year, stress condition of earthquake gestation time, seismic region structure and medium structure. It is revealed that the precursor anomalies are complex and diversity. Finally, the anisotropy mechanism of resistivity anomaly is analyzed.