A M_S6.1 earthquake occurred in sea on the east of Changjing River mouth on Feb.9,1996.Tiltmeter at Huzhou station 290 km from the epifocus recorded medium- and short-term anomalies,and that at Ningbo station 240 km from the epifocus recorded short-term anomalies. This paper gives a description of anomaly evolutionary process and prediction of three factors.