Jensen-Shannon Complexity and Permutation Entropy Analysis of Geomagnetic Auroral Currents

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Research units

  • Uppsala University
  • University of Michigan, Ann Arbor
  • University of Helsinki


In this study we determine whether auroral westward currents can be characterized by low-dimensional chaotic attractors through the use of the complexity-entropy methodology developed by Rosso et al. (2007, and based on the permutation entropy developed by Bandt and Pompe (2002, Our results indicate that geomagnetic auroral indices are indistinguishable from stochastic processes from time scales ranging from a few minutes to 10 hr and for embedded dimensions d < 8. Our results are inconsistent with earlier studies of Baker et al. (1990,, Pavlos et al. (1992), D. Roberts et al. (1991,, D. A. Roberts (1991,, and Vassiliadis et al. (1990,, 1991, indicating that auroral geomagnetic indices could be reduced to low-dimensional systems with chaotic dynamics.


Original languageEnglish
JournalJournal of geophysical research: Space physics
Publication statusE-pub ahead of print - 1 Jan 2019
MoE publication typeA1 Journal article-refereed

ID: 33458958