in order to improve the accuracy of observations and make further research, the in-situ relative calibration and absolute calibration of the 4-component borehole strainmeter at guza station were made.
为提高观测数据的準确性,对姑咱台四分量鉆孔应变观测进行了实地相对标定和实地绝对标定。
in this article we have made analyses and comparisons of synchronized data from an extensometer and a 4-component borehole strainmeter at yingkou seismological station.