The finite element method （FEM） of 3D linear elastic model has been used to calculate the effect of ground temperature variation with different amplitudes to the baseline observation in and around Tangshan seismic station. And the strain induced from the ground temperature variations was also estimated. The results show that the yearly amplitude of the displacement among bench marks induced by the temperature variation can be up to 2mm or so, which is almost the same as that of the yearly variation of the data observed at the station. This means that the effect of the temperature is included in the data. What＇s more, the displacements among 4 bench marks and their strain serials are delayed about 1 or 1.5 months compared with the temperature changes. At the same time, there are synchronous trend changes in the 4 segments, which cannot be explained from the temperature variation and may be connected with the strain adjustment and/or fault movements.[著者文摘]