系统地分析了夏垫断裂１９９０～１９９６年Ｈ２的动态变化，对比分析首都圈在此期间全部地震活动资料，发现地下气体Ｈ２释放量与地震活动有密切关系．由各年地震活动频度图和Ｈ２的动态变化图及释放强度图可以看出，Ｈ２释放主要与地震震级及活动频度有关，震级高、活动频度大，Ｈ２释放量及异常幅度也大． This paper systematically analyzes the dynamic changes of H2 in summer mat from 1990 to 1996. Comparing all the seismic activity data of the metropolitan area during this period, it is found that there is a close relationship between the H2 release of underground gas and the seismic activity. From the seismic activity frequency maps of each year and the dynamic change maps and release intensity maps of H2, it can be seen that H2 release is mainly related to earthquake magnitude and activity frequency, high magnitude, high frequency of activity, large amount of H2 emission and anomalous magnitude .