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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 9, issue 5/6
Nonlin. Processes Geophys., 9, 419–423, 2002
https://doi.org/10.5194/npg-9-419-2002
© Author(s) 2002. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: New Perspectives in Magnetospheric Dynamics: Chaos, Fractals,...

Nonlin. Processes Geophys., 9, 419–423, 2002
https://doi.org/10.5194/npg-9-419-2002
© Author(s) 2002. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  31 Dec 2002

31 Dec 2002

Fractal time statistics of AE-index burst waiting times: evidence of metastability

G. Consolini1 and P. De Michelis2 G. Consolini and P. De Michelis
  • 1Istituto di Fisica dello Spazio Interplanetario – CNR, Roma, Italy
  • 2Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy

Abstract. Recent observations and analyses evidenced that the magnetotail, as well as the magnetospheric dynamics are characterised by a scale-free behaviour and intermittence. These results, along with numerical simulations on cellular automata, suggest that the observed scale-invariance may be due to forced and/or self-organised criticality (FSOC), meaning that the magnetotail operates near a marginally stable state (Chang, 1999). On the other hand, it was underlined that a complex magnetic field topology in the geotail regions may play a relevant role in the impulsive energy relaxation (Consolini and Chang, 2001.

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