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Clustering of polarity reversals of the geomagnetic field (Articolo in rivista)

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Clustering of polarity reversals of the geomagnetic field (Articolo in rivista) (literal)

Anno

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Carbone, V; Sorriso-Valvo, L; Vecchio, A; Lepreti, F; Veltri, P; Harabaglia, P; Guerra, I (2006)
Clustering of polarity reversals of the geomagnetic field
in Physical review letters (Print)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Carbone, V; Sorriso-Valvo, L; Vecchio, A; Lepreti, F; Veltri, P; Harabaglia, P; Guerra, I (literal)

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Rivista

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Univ Calabria, Dipartmento Fis, I-87036 Arcavacata Di Rende, CS, Italy; CNISM, Unita Cosenza, Arcavacata Di Rende, CS, Italy; CNR, INFM, Liquid Crystals Lab, I-87036 Arcavacata Di Rende, CS, Italy; Osserv Astrofis Arcetri, I-50125 Florence, Italy; Univ Basilicata, Dipartimento Struttura Geotecn & Geol Applicata I, I-85100 Potenza, Italy (literal)

Titolo

Abstract

Often in nature the temporal distribution of inhomogeneous stochastic point processes can be modeled as a realization of renewal Poisson processes with a variable rate. Here we investigate one of the classical examples, namely, the temporal distribution of polarity reversals of the geomagnetic field. In spite of the commonly used underlying hypothesis, we show that this process strongly departs from a Poisson statistics, the origin of this failure stemming from the presence of temporal clustering. We find that a Levy statistics is able to reproduce paleomagnetic data, thus suggesting the presence of long-range correlations in the underlying dynamo process. (literal)

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