Natural time analysis enables the introduction of an order parameter for seismicity, which is just variance natural χ, κ1=⟨χ2⟩−⟨χ⟩2. During last years, there has been significant progress in seismicity. Milestones this are identification clearly distiguishable minima fluctuations κ1 seismicity both regional and global scale, emergence interrelation between correlations earthquake (EQ) magnitude...
