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.

• 摘要为提高观测数据的准确性，对姑咱台四分量钻孔应变观测进行了实地相对标定和实地绝对标定。