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扬州—铜陵地震带往黄海海域外延,即文中所指的下扬子北东地震带。本文从震级—频度的线性关系出发,采用递推累加计算方法,跟踪b值、M_max的变化,探讨它们与带内几次中强震的关系。初步认为用最小二乘法拟合的震级—频度分布最佳直线能在一定程度上显示出几次中强震的中(长)期背景。尤其采用递推累加的资料处理方法可以解决地震总数目稀少的困难,并引用几个模拟试验结果以说明这种递推累加作用与线性分析的合理性。
Yangzhou - Tongling earthquake to the Yellow Sea area extension, that is referred to in the text of the Lower Yangtze Seismic belt. Based on the linear relationship between magnitude and frequency, the paper uses the recursive accumulation method to track the changes of b values and M_max, and discusses the relationship between them and several moderate-strong earthquakes in the band. It is preliminarily thought that the best straight line of the magnitude-frequency distribution fitted by the least squares method can show the medium (long) background of several moderate-moderate earthquakes to a certain extent. In particular, the use of recursive accumulation of data processing methods can solve the problem of scarce total number of earthquakes, and cited several simulation results to illustrate the recursive additive effects and linear analysis of the rationality.