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首都圈地震重点监视区是我国地震重点防御区和地震监视预报研究的重要试验区，区内布有流体化学测点35个，开展的多项地震流体地球化学研究已取得丰硕的成果，为地震预报研究作出了重要的贡献。笔者对部分流体地球化学组分的区域特征进行了初步分析，结果表明氡、汞、氢等组分具有较好的映震效能，它们在正常状态下，普遍具有低背景值且变化幅度不大的共性，而当地震活跃时，大部分测点的上述组分的含量均出现增高现象，成为地震短期预报的依据之一。
The key monitoring area in the metropolitan area is an important experimental area for China’s key earthquake defense area and earthquake monitoring and forecasting. There are 35 fluid chemical measuring points in the area, and a great deal of achievements have been made in the research of many earthquakes in the field. Forecast research has made an important contribution. The author has carried on the preliminary analysis to the regional characteristic of some fluid geochemistry components, the result indicated radon, mercury, the hydrogen and so on the component has the good earthquake activity, in the normal condition, they generally has the low background value and the change range is not big However, when the earthquake is active, the contents of the above components in most of the measuring points all appear to increase, making it one of the bases for short-term earthquake prediction.