为研究地震前的电离辐射特征,我们于1978年底在焦作矿业学院安装了一台盖革-弥勒计数器,每天六次对电离辐射强度进行观测。五年来的资料表明,盖革-弥勒计数器测值异常与焦作附近地区的近震活动有较好的对应关系;菏泽5.9级地震前六天,计数又出现较大幅度的正异常,其数值达背景值的2.8 倍。 In order to study the characteristics of ionizing radiation before the earthquake, we installed a Geiger-Maitrek counter at Jiaozuo Mining Institute in late 1978 and observed the intensity of ionizing radiation six times a day. The data from five years indicate that there is a good correspondence between the Geeger-Maitrell counter anomalies and the near-earthquakes in the vicinity of Jiaozuo. For the first six days before the M5.9 Heze earthquake, there is a large positive anomaly in the count, 2.8 times the background value.