Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4022
AuthorsConsolini, G.* 
De Michelis, P.* 
TitleA revised forest-fire cellular automaton for the nonlinear dynamics of the Earth’s magnetotail
Issue DateSep-2001
Series/Report no.13 / 63 (2001)
URIhttp://hdl.handle.net/2122/4022
KeywordsEarth's magnetosphere
Magnetotail dynamics
Criticality
Subject Classification01. Atmosphere::01.03. Magnetosphere::01.03.03. Magnetospheric physics 
01. Atmosphere::01.03. Magnetosphere::01.03.04. Structure and dynamics 
AbstractRecent observations and numerical simulations seem to suggest that the Earth’s magnetotail plasma could exist in a near-criticality configuration, and that many features of the magnetospheric response to solar wind changes could be described by avalanche models displaying self-organized criticality. Further evidences of this near-criticality dynamics have been found analyzing the statistical features of the auroral electrojet (AE) index. Here, we present a cellular automaton, based on a revised version of the well-known forest-fire model, for the nonlinear dynamics of the Earth’s magnetotail. This simple model, chaotically driven using a 1-d coupled map, is able to capture many of the statistical features of the magnetospheric response to solar wind changes. The results, compared with previous analyses of the AE-index features, are discussed in the framework of a near-criticality dynamics of the magnetospheric tail plasma.
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