四川姑咱台钻孔应变仪异常核实分析

Verification and Analysis of Abnormal Borehole Strain Gauge in Guza Station,Sichuan Province

2020年5月至2021年7月,姑咱地震台YRY-4分量钻孔应变仪出现了明显的4个分量同步压性-张性异常变化,经过系列异常排查和实验,利用对比分析、自检性分析、滤波分析等方法,最终认定该异常变化为仪器数采故障引起的干扰,排除了地震前兆异常的可能。

Between May 2020 and July 2021,the Guza seismic station YRY-4 showed abnormal that appeared to be obvious in four trends including synchronous changes of compressional and extensional variations.Based on a series of abnormal check,experiment,comparative analysis,self-checking methods,and filtering analysis,we concluded that the abnormal changes were caused by the interference,which excluded the possibility of earthquake precursory anomalies.