TY - JOUR
TI - Natural-time analysis of critical phenomena: The case of seismicity
AU - Varotsos, P. A.
AU - Sarlis, N. V.
AU - Skordas, E. S.
AU - Uyeda, S. and
AU - Kamogawa, M.
JO - Europhysics Letters (EPL)
PY - 2010
VL - 92
TODO - 2
SP - null
PB - IOP Publishing Ltd
SN - null
TODO - 10.1209/0295-5075/92/29002
TODO - null
TODO - We first investigate in natural time the numerical simulations of a
simple deterministic self-organized critical system introduced to
describe avalanches in stick-slip phenomena. It is one-dimensional and
belongs to the same universality class as the train model for
earthquakes introduced by Burridge and Knopoff. We show that the
variance kappa(1) = <chi(2)> - <chi >(2) of natural time chi, becomes
approximately equal to 0.070 when the system approaches the critical
state. Next, we analyze in natural time the small earthquakes subsequent
to the low-frequency magnetic-field precursor observed near the
epicenter of the Ms7.1 Loma Prieta earthquake in 1989. We find that
almost five days before the mainshock, the condition kappa(1)
approximate to 0.070 was reached. Copyright (C) EPLA, 2010
ER -