ANALYSIS TO THE IMMINENT ANOMALIES OBSERVED IN WUJIAHE DEFORMATION STATION BEFORE THE M4.8 EARTHQUAKE OF WULATEQIANQI

some imminent anomalies appeared at Wujiahe crustal deformation station before the M4.8 earthquake in Wulateqianqi on June 5, 2001. The epicenter is 80 kilometers from the station in southeast.From the first days to the third day before the earthquake the observing value exceed 3 times of the normal value.The anomalies were tracked and reported in time.Processed With filtering and rate checking, the data of the station show a good effect in reflecting earthquake.The imminent anomalies before the earthquake is mainly discussed in this paper.