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本文讨论我国现行地震安全性评价中,地震活动性研究统计区域的选择及b值计算中存在的问题,提出不一定以地震区带作为统计区域的建议。文中同时指出,累计b值的正确概念应该是无震级上限累计b值,应采用迭代回归计算。文中用实际例子说明作者的建议。
This paper discusses the selection of statistical area for seismic activity research and the existing problems in the calculation of b value in the current seismic safety assessment in China. It is suggested that the seismic zone may not be used as the statistical area. In the meantime, it is pointed out that the correct concept of cumulative b value should be the cumulative b value without upper limit of magnitude, which should be calculated by iterative regression. The article uses examples to illustrate the author’s suggestions.