OBSERVATION OF EARTH TIDE WITH THE TILTMETER TYPE SQ-70B AT THE TAIAN STATION

This article reports the work of earth tide observation with high precision at the Tai-An seismic station of shandong province. The instrument used was a fused quartz horizontal pendulum tiltmeter, type SQ-70B, the sensitivity of which could reach 0.0004 second per millimeter, and the data obtained were stable and reliable.The article also reports the results of factor and phase lag calculated from the data obtained at Taian area since May 1980. The results are, in the main tides of EW component, as follows:（M2）=0.6480.004（K2）=0.6320.019（O1）=0.6990.028（K1）=0.7400.029（M3）=0.7310.126k（M2）=-13.60.4K（K2）=-14.51.9K（O1）=-13.92.4k（K1）=-14.02.0k（M3）=11.59.9