利用地磁场总强度预测地震三要素初探

摘要

Autocorrelation coefficients of data of geomagnetic total intensity of neighboring periods from six stations in Henan province are calculated respectively.The relationship between the coefficients and earthquakes is analysed.The results show there is a good correlation between them.The original time is usually within 1～8 months after the lowest value of the coefficients.Empirical formulas between magnitude,anomalous area of the autocorrelation coefficients and epicentral distance for every station are statistically obtained.By using the empirical formulas of three or more stations and intersection method,the magnitude and epicenter of coming earthquake can be forecasted.The test results show the method is basically feasible.%计算了河南省6个台站的相邻时段的地磁场总强度观测资料的自相关系数．分析了各台自相关系数的变化与地震的关系．各台的自相关系数曲线对应地震的效果较好．发震时间一般在异常低值后1～8个月．统计得出了各台所对应的地震震级与自相关系数异常面积和震中距的经验公式．利用3个以上台站的经验公式和交汇法，即可以求出震中位置和地震震级．经震例检验，该方法基本可行．