# Statistical Significance of Minimum of the Order Parameter Fluctuations of Seismicity Before Major Earthquakes in Japan

@article{Sarlis2014StatisticalSO,
title={Statistical Significance of Minimum of the Order Parameter Fluctuations of Seismicity Before Major Earthquakes in Japan},
author={N. Sarlis and E. Skordas and S. Christopoulos and P. Varotsos},
journal={Pure and Applied Geophysics},
year={2014},
volume={173},
pages={165-172}
}
In a previous publication, the seismicity of Japan from 1 January 1984 to 11 March 2011 (the time of the $$M9$$M9 Tohoku earthquake occurrence) has been analyzed in a time domain called natural time $$\chi.$$χ. The order parameter of seismicity in this time domain is the variance of $$\chi$$χ weighted for normalized energy of each earthquake. It was found that the fluctuations of the order parameter of seismicity exhibit 15 distinct minima—deeper than a certain threshold—1 to around 3 months… Expand
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