Chaotic behaviour of interplanetary magnetic field under various geomagnetic conditions |
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| Authors: | Remanan Remya K Unnikrishnan |
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| Institution: | 1. Department of Water Resources and Environment, Sun Yat-sen University, Guangzhou 510275, China;2. Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong High Education Institute, Sun Yat-sen University, Guangzhou 510275, China;3. School of Geography and Planning, Guangdong Key Laboratory for Urbanization and Geo-simulation, Sun Yat-sen University, Guangzhou, China;4. Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong, China;5. Department of Biological & Agricultural Engineering, Texas A&M University, College Station, TX 77843-2117, USA;6. Department of Civil and Environmental Engineering, Texas A&M University, College Station, TX 77843-2117, USA |
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| Abstract: | 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. |
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