平凉地震台前兆异常对比分析

Analysis to the precursory anomalies in Pingliang Seismic Station

平凉地震台前兆观测始于1975年。随着观测技术的不断提高,最初的几个测项经过多年筛选、优化组合后仅剩附件厂人工水氡观测,现运行的其他前兆手段均为1997年以后增加或改建项目。所有数字观测项目为2001年"九五"数字化改造项目。所以对这些手段的观测效能做个评价很有必要。本文着重通过本监视区发生的几个有限地震及甘肃省玉门5.9级地震和新疆库塞湖8.1级大震前后相对应的观测手段资料出现的异常进行总结,做一初步分析。

The precursory observation of Pingliang Seismic Station begin in 1975. With the improve of observation technique, the first several artificial observation items is only radon in Fujian change after many years selection and well combination. The other precursory items were all raised or reconstructed in 1997. All digtal observation items are ＂the 9th Five-Year Plan＂ digtal amendment projects in 2001. So it is necessary to, appraise inherent observation quality of these items. The article summarized and analysed the precursory anomalies in these items by our observation areas,Yumen Ms 5.9 and Kusaihu Ms 8.1 earthquakes.