Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/363
AuthorsDe Santis, A.* 
Tozzi, R.* 
Gaya-Piqué, L.* 
TitleInformation content and K-entropy of the present geomagnetic field
Issue Date2004
Series/Report no.218 (2004)
DOI10.1016/S0012-821X(03)00681-2
URIhttp://hdl.handle.net/2122/363
Keywordsinformation theory
Kolmogorov entropy
geomagnetic field
geomagnetic reversals
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.02. Geomagnetic field variations and reversals 
AbstractConcepts of information theory are applied to global models of the geomagnetic field B of the last century. The temporal behavior of information content suggests that B is in a chaotic state with characteristic times close to those of its westward drift and of the convective overturn in the outer core and the secular variation shows a comparable characteristic time of predictability. The main implication of these results is the suggestive hypothesis that a possible geomagnetic reversal or excursion is currently in progress.
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