Scale free networks of earthquakes and aftershocks

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dc.creatorBaiesi, Marco
dc.creatorPaczuski, Maya
dc.date2003-09-21
dc.date.accessioned2026-07-07T02:53:42Z
dc.date.available2026-07-07T02:53:42Z
dc.descriptionWe propose a new metric to quantify the correlation between any two earthquakes. The metric consists of a product involving the time interval and spatial distance between two events, as well as the magnitude of the first one. According to this metric, events typically are strongly correlated to only one or a few preceding ones. Thus a classification of events as foreshocks, main shocks or aftershocks emerges automatically without imposing predefined space-time windows. To construct a network, each earthquake receives an incoming link from its most correlated predecessor. The number of aftershocks for any event, identified by its outgoing links, is found to be scale free with exponent $γ= 2.0(1)$. The original Omori law with $p=1$ emerges as a robust feature of seismicity, holding up to years even for aftershock sequences initiated by intermediate magnitude events. The measured fat-tailed distribution of distances between earthquakes and their aftershocks suggests that aftershock collection with fixed space windows is not appropriate.
dc.description7 pages and 7 figures. Submitted
dc.identifierhttps://arxiv.org/abs/cond-mat/0309485
dc.identifierhttp://arxiv.org/abs/cond-mat/0309485
dc.identifierPhys. Rev. E 69, 066106 (2004)
dc.identifierdoi:10.1103/PhysRevE.69.066106
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22266
dc.subjectStatistical Mechanics
dc.subjectGeophysics
dc.titleScale free networks of earthquakes and aftershocks
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