【摘要】 对地下水位地震前兆异常开展了参数提取方法的研究, 并以其提取的结果为输入, 对1984~2002年华北地区地下水位异常参数分布做了全时空扫描, 继而将全部图像与华北地区构造活动性量化评估的数字化图像进行了叠加, 实现了地下水位异常动态扫描与区域构造活动性背景的结合。在此基础上, 对1985年以来华北地区5 级以上地震前的地下水位短期图像演化情况做了全面分析, 提取出了判别异常区的指标以及地震短期异常区的演化特征, 并最终建立了华北地区强震前地下水位短期前兆的判别标志。更多还原

【Abstract】 In this paper, the authors studied a method, in which the anomaly parameter of seismic precursor is abstracted form the observed data of underground water level, and the spatial distribution patterns of the anomaly parameters in North China was scanned from 1984 to 2002 by using the parameters abstracted as inputs, and than, every pattern was superposed with the numerical pattern or quantitative evaluation about the tectonic activity and seismic risk in North China, to realize combining the spatial scanning of precursor anomaly with active tectonic background. On the above-mentioned basis, the analysis was made entirely for the evolution of short-term patterns of underground water before (M_S5.0) shocks which took place since 1985 in North China, so the discriminative criteria of anomaly zones and the characteristics of spatial evolution of short-term precursors of underground water level before strong shocks in North China was established.更多还原