Аннотация:The methods for investigating synchronization of multiple geophysical monitoring time series are presented, which are based on using wavelet-based and spectral measures of coherence, estimated within moving time window. The methods are applied to the sequences of multifractal and entropy parameters of initial data calculated for adjacent time intervals of certain length. Precursory properties of coherence and multifractal structure of seismic noise at global and regional networks are investigated. Analysis of global seismic noise coherence extracts effect of progressively increasing synchronization after Sumatra mega-earthquake, which could be a precursor of the further rise in the intensity of the strongest seismic events. Analysis of seismic noise at Japan gave a possibility for prediction of Tohoku earthquake on 2011.03.11. According to the analysis of seismic noise after 2011.03.11 the next mega-earthquake could occur at the region of Nankai Trough.
Keywords: seismic noise, synchronization, coherence, multifractals, entropy, earthquake prediction, spots of seismic danger.