假设了一个异常起始时氡浓度相对迅速增长的震前氡异常模型。基于这一模型的计算表明,根据氡异常形态与测点的震中距相关可导出一参数。在调整了某些参数后,模型计算与观测到的地震前兆异常充分符合。 Suppose a pre-earthquake radon anomaly model with a relatively rapid increase in radon concentration at the onset of anomalies. The calculation based on this model shows that a parameter can be derived from the correlation between the anomalous morphology of radon and the epicentral distance of the measuring point. After some parameters were adjusted, the model calculations were in good agreement with the observed anomalies of seismic precursors.