Anomalous diffusion of epicentres

TL;DR

This paper investigates the anomalous diffusion behavior of earthquake epicenters within a complex network of correlated seismic events, revealing anti-diffusive patterns suggestive of fractional kinetics.

Contribution

It introduces a network-based classification of earthquakes and demonstrates anomalous anti-diffusive epicenter behavior linked to main shocks.

Findings

Epicenters exhibit anomalous anti-diffusive diffusion.

Main shocks attract surrounding seismic activity.

Results suggest fractional kinetic processes govern earthquake clustering.

Abstract

The classification of earthquakes in main shocks and aftershocks by a method recently proposed by M. Baiesi and M. Paczuski allows to the generation of a complex network composed of clusters that group the most correlated events. The spatial distribution of epicentres inside these structures corresponding to the catalogue of earthquakes in the eastern region of Cuba shows anomalous anti-diffusive behaviour evidencing the attractive nature of the main shock and the possible description in terms of fractional kinetics.