Abstract：Using kinematic analysis module TRACK of GAMIT/GLOBK to process 1 Hz GPS data of eight continuous stations around Japan by regarding the IGS site SHAO as a reference,we obtained and analyzed the kinematic deformation series which caused by the Mw9.0 Japan earthquake on March 11,2011. The result shows that most of the stations were moving towards southeast when the earthquake occurred.The maximum horizontal amplitude of MIZU and USUD , the two closest sites to the epicenter, are 3.11 m and 0.67 m ,respectively. To reduce systematic errors in the positioned result which are relevant to the surrounding environment of station, we filtered the kinematic deformation series of USUD in NS direction using modified sidereal filtering method. After applying modified sidereal filtering method,the root mean square error of kinematic deformation series of USUD in NS direction is decreased from 1.65 cm to 0.82 cm.
