Phys. Rev. E 72, 041103 (2005) [8 pages]Similarity of fluctuations in correlated systems: The case of seismicityReceived 15 September 2004; revised 5 July 2005; published 18 October 2005 We report a similarity of fluctuations in equilibrium critical phenomena and nonequilibrium systems, which is based on the concept of natural time. The worldwide seismicity as well as that of the San Andreas fault system and Japan are analyzed. An order parameter is chosen and its fluctuations relative to the standard deviation of the distribution are studied. We find that the scaled distributions fall on the same curve, which interestingly exhibits, over four orders of magnitude, features similar to those in several equilibrium critical phenomena (e.g., two-dimensional Ising model) as well as in nonequilibrium systems (e.g., three-dimensional turbulent flow). © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.72.041103
DOI:
10.1103/PhysRevE.72.041103
PACS:
05.40.−a, 91.30.Dk, 89.75.Da, 89.75.−k
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