摘要
The authors analyze characteristics of the normal background noise of borehole deformation observation data recorded at Sheshan Station in Shanghai,and quantitative characterize variation characteristics of their normal information field.The results show that the different scales of the wavelet transform detail parts of deformation observation data contain different signal components.Through studying the non-seismic anomaly characteristics change of different signal scale of wavelet transform,we may obtain precursor information of the earthquake preparation process.