CHARACTERISTICS OF REPEATED MEASUREMENT DATA OF SHORT-LINE LEVELING IN TANGSHAN STATION

Based on the preliminary analysis of short-line leveling repeated measurement data collected from 2003 to 2010, its monthly frequencies are calculated and compared by different short-line leveling segments, which show that the frequency is less in July and that is more in January and March.Then the repeated measurement data series are combined with the air temperature, cumulated monthly precipitation and the monthly earthquake frequencies to get the correlation.And the result shows that there is no clear correlation between frequency of the shortline leveling repeated measurement and air temperature or precipitation, but some connection between the short-line leveling repeated measurement and regional seismicity.