腾冲台四分量钻孔应变观测数据质量分析

QUALITY ANALYSIS OF 4-COMPONENT BOREHOLE STRAIN OBSERVATION DATA OF TENGCHONG SEISMIC STATION

以腾冲地震台2017~2021年YRY-4钻孔应变仪观测数据为研究对象,对观测数据进行调和分析计算潮汐参数,计算元件相对校正系数、自检内精度。结果显示,2018年12月北西分量数据传输线被挖断重新连接以后,北西分量潮汐因子逐年变小,相对校准系数逐年增大,自检内精度逐年下滑;其余分量观测精度也存在不同程度下滑。分析认为北西分量相对校准系数远大于1与传输线腐蚀生锈加剧有密切关系。

Taking the observation data of the YRY-4 borehole strain gauge from 2017 to 2021 at the Tengchong Seismic Station as the research object, the observation data is harmonically analyzed to calculate the tidal parameters.The relative correction coefficient of the components and the internal precision of the self-check is calculated.The results show that after the north-west component data transmission line was cut and reconnected in December 2018,the tidal factor of the north-west component decreased year by year.The relative calibration coefficient increased year by year, and the self-checking accuracy decreased year by year.The observation accuracy of the remaining components also declined to varying degrees.The relative calibration coefficient of the north-west component is much larger than 1,which is closely related to the aggravation of corrosion and rust of the transmission line.