Study of the anomaly of seismic fractal spectrum before strong earthquakes

3 Conclusions The research of some theoretical Contor models of multi-scale and the numerical model of seismic spatial distribution show that the physical property of anomalies in seismic fractal spectrums is due to an increment of nonuniformity in the point set (earthquakes), in another word, the complexity increases. It is exactly the general precursory that the distribution pattern becomes complex from simple or nonuiform from uniform. So seismic multi-fractal spectrums is one of the best methods or tools for describing the complexity of seismic temporal-spatial distribution patterns. According to this view of point, taking the anomalies of the seismic multi-fractal spectrum as the earthquake prediction criterion is very valuable and worth while further studying. This project is supported by Chinese Joint Seismological Science Foundation.