Earthquake data recurring to the two-dimensional à trous WT algorithm was analysed. In this process

by inducting noise model in the wavelet space and using significant statistic hypothesis test

the multi-resolution support of the useful information interested

that is the abnormal phenomena of the earthquake sequence was obtainned. Using these tools

we can extract the epicentral spatial distributed characters in north China at variant scale levels

and supply evidences for identifying the law of distribution of moving conformation.