Point defect parameters in β-PbF2 revisited

Entropy in Natural Time and the Associated Complexity Measures

“…The criticality of the OFC model has been debated [87,88]. Also, the SOC behavior of the model is destroyed upon introducing some small changes in the rules of the model, e.g., replacing open boundary condition with periodic boundary conditions [89], introducing frozen noise in the local degree of dissipation [90] or in its threshold value [91], including lattice defects [92] (which should not be confused with the intrinsic lattice defects in solids [93], e.g., Schottky [94,95] or Frenkel [96,97] defects). Despite these findings as well as others which show [98] that it is insufficient to account for certain aspects of the spatiotemporal clustering of seismicity, the OFC model appears to show many features found in real earthquakes.…”

Additional studies on heterodiffusion coefficients in periclase

“…The above equation also holds for different process mechanisms (e.g. formation and migration) and has been tested in various cases such as in alkali and silver halides Alexopoulos, 1977b, 1982), in lead fluorides (Varotsos, 2008), in diamonds (Varotsos, 2007a) in metals (Alexopoulos and Varotsos, 1981; etc. Furthermore, it has been shown to account for the thermodynamic parameters for the defect activation in ionic solids (Varotsos et al, 1999) upon increasing the pressure.…”

A tentative model for the explanation of Båth law using the order parameter of seismicity in natural time

“…natural time is set to 0 at the initiation of the SES activity. SES are the transient changes of the electric field of the Earth generated by means of a mechanism of point defects (Varotsos et al 1993;Varotsos 2008) and that have long been successfully used for short-term earthquake prediction (Varotsos et al , 2009. In this computation, only the earthquakes that occur in the area of the forthcoming earthquake, which is determined on the basis of SES properties (Varotsos and Alexopoulos 1984a, b) are considered.…”