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通过对安装在宁波台ＺＫ０３ 井上的ＳＤ－ ３ 型自动测氡仪记录的１９９８ 年３ 月～８ 月整点值曲线图的分析，发现在距离该井８０ 多公里的嵊州等地先后发生的３－３ 级和４－５ 级地方震前，具有明显的、非常相似的临震前兆异常。主要特征为震前十几天开始出现整点测值向下突跳，数天后再出现频繁的整点测值向上突跳的形式，并以正异常为主。这是继该仪器在１９９６ 年长江口以东南黄海海域发生的ＭＳ６．１ 地震前记录到临震异常后，又记到的临震异常。笔者认为前兆数字观测仪器将在地震临震预报研究中发挥重要作用。
Based on the analysis of the whole point value chart of March-August 1998 recorded by the SD-3 automatic radon monitoring instrument installed on the well ZK03 in Ningbo station, it was found that in the place of Shengzhou and other places more than 80 kilometers away from the well, -3 and 4-5 before the local earthquake, with obvious, very similar projectile precursory anomalies. The main characteristics of the whole point of the beginning ten days before the onset of sudden drop value measured point, a few days after the recurrence of the whole point of the value of sudden jump in the form of positive anomalies. This is the epicenter of the earthquake which was recorded after the device recorded the calamity anomaly before the MS6.1 earthquake in the southeast Yellow Sea in the Yangtze River estuary in 1996. I believe that precursory digital observation instruments will play an important role in the study of earthquake quake prediction.