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
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摘要
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 observation data from 1990 to 1999 at Xinyi Seismic Station with the velocity method and Fourier slipping method,resistivity anomalies 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.
Analysis about earth resistivity observation data from 1990 to 1999 at Xinyi Seismic Station with the velocity method and Fourier slipping method,resistivity anomalies 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.
引文
[1]新沂地震小区划报告,江苏省地震局工程院。1989
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李飞,陈有发.1999.苍山5.2级地震和新沂台电阻率异常[J].高原地震,11(2):66～69
李献智.1996.强震远场前兆异常在地震预报中应用[J].地震,16(1):39～44
阮爱国,李清河,赵和云.2000.APE理论与地电阻率前兆[J].西北地震学报,22(3):209～216
赵跃晨,刘小伟.1985.一种消除年变的数据处理方法[M].见:预报地震地电方法论文集,福建科技出版社,139～144
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