Abstract
AbstractUsing USGS global catalog of M ≥ 5.0 earthquakes between 1850 and 2012, a time series of global seismic energy is set up. The wavelet transform is applied to these time series in order to analyze their quasi‐period characteristics. The results show that the time series of global seismic energy contains three quasi‐periodicity components of 9‐year, 19‐year and 45‐year, and the 45‐year quasi periodicity is most prominent. Combined with the physical background of the periodicities of tidal forces, the correlations between long‐period tidal forces and quasi periodicity of seismic energy release are discussed. Quasi‐period component related to short‐periodic tides is not found in global seismic energy release.
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