Abstract: Step and pulse changes caused by water level vibration have been observed in ZK03 well of Ningbo seismic station.Similar changes caused by deformation waves are also observed in VS vertical pendulum tiltmeter of Ningbo seismic station.According to our analysis these changes may be the coseismic effects of Wenchan Ms8.0 earthquake.Rise of dynamic water level in the ZK03 well is about 12mm.Eastward pulse type oscillatory waves are observed at EW component of the VS vertical pendulum tiltmeter with westward step,the maximum amplitude of the pulse is about 339.9286×10^-3".Southward pulse type oscillatory waves are observed at NS component with westward step,the maximum amplitude of the pulse is about 275.2411×10^-3".Comparative analysis indicates that the observation data of Ningbo seismic station has the advantages of low background,high signal-to-noise ratio.