Mathematics – Probability
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm52a17c&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM52A-17
Mathematics
Probability
2708 Current Systems (2409), 2740 Magnetospheric Configuration And Dynamics, 2744 Magnetotail, 2788 Storms And Substorms, 7859 Transport Processes
Scientific paper
Previous works on magnetic field fluctuations during tail current disruption evidenced the occurrence of intermittency. Here, using magnetic field data relative to three current disruption (CD) events as observed by AMPTEE/CCE spacecraft, we investigate the statistical features of magnetic field fluctuations. In detail, in the kinetic domain, i.e. below the cyclotron frequency, the distribution function of magnetic field fluctuations during CD shows power-law tails and a return probability Pτ (0) of the fluctuations at different time scales τ which is well in agreement with a Levy-process. Conversely, in the MHD-region fluctuation statistics seems to be compatible with a classical brownian motion. Results are discussed in connection with previous analyses on intermittency.
Consolini Giuseppe
Lui A. T.
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