Physics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jastp..72..662r&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 72, Issue 9-10, p. 662-675.
Physics
2
Interplanetary Magnetic Fields, Geomagnetic Activity, Solar Activity Variations, Heliosphere/Interstellar Medium Interactions
Scientific paper
In the present study, the deterministic chaotic behaviour of interplanetary magnetic field (IMF) under various geomagnetic conditions of low and high solar active periods was analyzed, using the time series of IMF B and Bz, by employing chaotic quantifiers like, Lyapunov exponent, Tsallis entropy, correlation dimension, and non-linear prediction error. We have investigated whether the chaotic behaviour of interplanetary magnetic field would modify, when it produces major geomagnetic storms, and how it depends on the phase of solar activity. The yearly average values of Lyapunov exponent for the time series of IMF B and Bz, show solar flux dependence, whereas those values of entropy, correlation dimension and non-linear prediction error had no significant solar flux dependence. The yearly average values of entropy for quiet periods are higher compared to those values for major storm periods belonging to low/high solar active conditions, for both the time series B and Bz.
Remya Remanan
Unnikrishnan K.
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