古浪—海原断裂带“无震异常”的意义

• 作 者: 淙和
• 出 处: 地震
• 发表日期: 1981年01期
• 关键词: 前兆异常 海原 断裂带 靖远 年冬 天祝 近震 地下水动态 大震 井水位

近年来,在监视预报地震的实践中,经常遇到有显著前兆异常而无近震与之对应的情况,此即所谓“无震异常”。1979年冬至1980年春,我省靖远—天祝一带出现一批地下水动态异常,异常之强烈及其展布范围之大,为近十年来所罕见,同时伴有一些其它前兆异常现象,但至今该地区没有发生5级以上地震。

In recent years, in the practice of monitoring and forecasting earthquakes, there are often cases of significant precursory anomalies without corresponding near-earthquakes. This is called “earthquake-free anomalies.” From the winter of 1979 to the spring of 1980, a group of groundwater dynamic anomalies appeared in the Jingyuan-Tianzhu area of ​​our province. The anomaly is intense and the scope of its distribution is large. It has been rare for the last ten years and accompanied by some other precursor anomalies, No earthquakes of magnitude 5 or above occurred in this area.