国内外已有较多的观测资料表明,强震前地下水中氡浓度会出现异常变化.为了深入研究这些变化,进一步提取可靠的前兆信息,寻找定量判据,作者最近研制了水化前兆数据处理专用程序包,对地下水氡含量观测资料进行处理.用一阶差分法发现,在一些观测条件较好的水点上,震前氡测值出现了离散度加大的现象,这种现象有可能成为判别短临异常的一种新的判定指标. There are more observations at home and abroad that radon concentration in groundwater will change abnormally before strong earthquakes.In order to further study these changes and further extract reliable precursor information to find quantitative criteria, the author recently developed hydrated precursor data processing Special package to deal with groundwater radon observation data.Using first-order difference method, it is found that on some well-observed water spots, there is a phenomenon that the dispersion of radon measured before earthquakes increases, which is possible Become a new judgment index to judge short-term anomaly.