Self-organized branching of magnetotail current systems near the percolation threshold

Details Self-organized branching of magnetotail current systems near the percolation threshold Self-organized branching of magnetotail current systems near the percolation threshold

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...106.6291m&link_type=abstract

Journal of Geophysical Research, Volume 106, Issue A4, p. 6291-6308

Physics

Geophysics

18

Magnetospheric Physics: Current Systems, Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Storms And Substorms, Mathematical Geophysics: Fractals And Multifractals

Scientific paper

This paper advocates an application of the fractal topology formalism to an analysis of the magnetotail current systems. Our main attention is concentrated on the magnetotail regions with the considerably stretched background magnetic field; such conditions can be the case in the distant tail, as well as in the near-Earth tail at the late substorm growth phase. Structural properties of the current system at the self-organized (quasi)stationary states are analyzed in relationship with the universal fractal geometry of the percolating fractal sets near the critical threshold. We found that the violation of the criticality character leads to the topological phase transition in the system; this transition has features of a structural catastrophe and is associated with the magnetospheric substorm onset. A comparison with various observational studies is given, and the possible directions of the future research are outlined.

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