Recently there as been much interest in determining if the global geomagnetic system, as characterized by AE and AL indices, can be described by a low dimensional, possibly chaotic, non‐linear dynamical system. By using a statistical method for detecting nonlinearity, we show that for one interval which has been previous analyzed (the first 8192 minutes of January 1983) there is no evidence for low dimensional behavior.
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Prichard et al. (1993) studied this question.
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