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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/8683

Authors: De Santis, A.*
Qamili, E.*
Cianchini, G.*
Title: Repeat-station surveys: implications from chaos and ergodicity of the recent geomagnetic field
Title of journal: Annals of Geophysics
Series/Report no.: 1 / 56 (2013)
Publisher: INGV
Issue Date: 18-Apr-2013
DOI: 10.4401/ag-5491
Keywords: Geomagnetic field
Repeat Stations
Ergodicity
Chaos
Abstract: The present geomagnetic field is chaotic and ergodic: chaotic because it can no longer be predicted beyond around 6 years; and ergodic in the sense that time averages correspond to phase-space averages. These properties have already been deduced from complex analyses of observatory time series in a reconstructed phase space [Barraclough and De Santis 1997] and from global predicted and definitive models of differences in the time domain [De Santis et al. 2011]. These results imply that there is a strong necessity to make repeat-station magnetic surveys more frequently than every 5 years. This, in turn, will also improve the geomagnetic field secular variation models. This report provides practical examples and case studies.
Appears in Collections:04.05.08. Instruments and techniques
05.01.04. Statistical analysis
04.05.03. Global and regional models
05.05.99. General or miscellaneous
04.05.05. Main geomagnetic field
Papers Published / Papers in press

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