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区域b值通常是使用M≥1(3/4)级的历史地震资料拟合得到.但对历史地震资料缺失较多的地区,这种计算方法就存在较大问题.近十多年来有了较为完整丰富的仪器记录资料,本文提出用它们来弥补历史地震资料的不足,以渤海周围地区和区内两条地震带为例,用历史记载地震资料(M≥6)、仪器记录地震资料(2～1.5级)和1900年以来的5级和5.5级地震资料一起进行回归计算,得到研究区和各地震带的b值为0.71～0.77,F检验在α=0.05显著水平上通过,相关系数达到0.99以上.这说明历史地震和现代地震有着共同的活动规律,两种资料一起使用计算b值是可行的.本文为历史地震资料缺乏的地区确定区城b值,提供了一种较为实用的办法,这在工程地震及用地震危险性分析方法编制地震区划图方面都有实际的意义
The value of region b is usually obtained by fitting the historical seismic data of M≥1 (3/4) level, but there is a big problem for the calculation of missing region in the history of seismic data. In this paper, we propose to use them to make up for the lack of historical seismic data. Taking the cases of two seismic belts around the Bohai Sea and the region as an example, we use the historical records of seismic data (M≥6), and record the seismic data (From grade 2 to grade 1.5) and grade 5 and grade 5.5 earthquakes since 1900, the b values for the study area and each seismic zone are 0.71 to 0.77, and the F-test is passed at a significant level of α = 0.05, with a correlation of Coefficient above 0.99.This shows that the historical earthquakes and modern earthquakes have a common law of activity.It is feasible to use two kinds of data together to calculate the b value.This paper provides a more practical Approach, which is of practical significance in engineering seismic and seismic zonation mapping with seismic hazard analysis methods