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自从地震危险性概率分析方法问世以来，不确定性就突出地存在．从该方法本身分析，认为潜在震源区范围、地震动衰减关系、震级上限、年发生率、ｂ值、起算震级是６个不确定性因素．计算结果表明，不确定性因素对地震烈度的影响较小，对峰值加速度的影响较大．由于不确定性因素对计算结果造成系统偏差，可通过权系数Ｐ进行校正，并给出了具体的校正公式．
Uncertainty has been prominent since the advent of seismic hazard probability analysis. From the analysis of the method itself, it is considered that there are six uncertainties in the range of potential source regions, the relationship between attenuation of earthquakes, the magnitude of upper magnitude, the annual incidence, b value, The calculation results show that the influence of the uncertainty factor on the earthquake intensity is small and the influence on the peak acceleration is larger. Due to the uncertainty of the calculation results caused by system deviation, can be corrected by the weight coefficient P, and gives a specific correction formula.