Dynamical evolution of the community structure of complex earthquake network

Details Dynamical evolution of the community structure of complex earthquake network Dynamical evolution of the community structure of complex earthquake network

2012-02-29

arxiv.org/abs/1202.6574v1

Physics

Geophysics

13 pages, 3 figures

Scientific paper

Earthquake network is known to be complex in the sense that it is scale-free, small-world, hierarchically organized and assortatively mixed. Here, the time evolution of earthquake networks is analyzed around main shocks in the context of the community structure. It is found that the maximum of the modularity measure quantifying existence of communities exhibits a peculiar behavior: its maximum value stays at a large value before a main shock, suddenly drops to a small values at the main shock, and then increases to relax to a large value again relatively slowly. In this way, a main shock is characterized in the language of theory of complex networks. The result is also interpreted in terms of the clustering structure of the earthquake network.

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