Study on scale dependence of strain value obtained from crustal deformation data

Using statistic analysis, the scale dependence of crustal stain value from crustal deformation data is studied. We found that there exists obvious correlation between strain value and computational figure scale. Along with increasing of figure element scale, the statistic mean value and mean square deviation of strain present power law attenuation. Based on this analysis, the necessity of strain value scale normalization is suggested for calculating strain field using crustal deformation data and the normalization method is proposed in this paper.