Abstract: This paper calculates and analyses solid tidal deformation data observed at Jixian seismic station, Hebei province. Short period and impending earthquake precursory anomalies before the above medium earthquakes in North China are extracted. The results show that the deformation data at Jixian seismic station have monitoring capability for ability above medium earthquakes in North China. ① Water tube tiltmeter and vertical pendulum tiltmeter data have medium to short period prediction capability for M_S≥5.0 earthquakes; ② Gravity observation data and strain tide data have prediction capability for above M_S5.0 earthquakes in North China and above medium earthquake in the Capital area; ③ Strain tide data have some indicating sense for azimuth of the epicenter.

Key words: Jixian seismic station, Solid tidal deformation, Prediction capability