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Low‐dimensional chaos in magnetospheric activity from AE time series
Author(s) -
Vassiliadis D. V.,
Sharma A. S.,
Eastman T. E.,
Papadopoulos K.
Publication year - 1990
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl017i011p01841
Subject(s) - physics , chaotic , statistical physics , phase space , solar wind , fractal dimension , fractal , series (stratigraphy) , mathematical analysis , mathematics , geology , computer science , thermodynamics , plasma , paleontology , quantum mechanics , artificial intelligence
The magnetospheric response to the solar wind input, as represented by the time series measurements of the AE index, has been examined using phase space reconstruction techniques. The system was found to behave as a low‐dimensional chaotic system with a fractal dimension of 3.6 and has a Kolmogorov entropy <0.2/min. These are indicative that the dynamics of the system can be adequately described by four independent variables and a corresponding intrinsic time scale is of the order of 5 min. The relevance of the results to magnetospheric modelling is discussed.