Fractal dynamics of the long-period irregular pulsations at the initial phase of a magnetic stormстатья

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[1] Klain B. I., Kurazhkovskaya N. A. Fractal dynamics of the long-period irregular pulsations at the initial phase of a magnetic storm // International journal of geomagnetism and aeronomy. — 2003. — Vol. 4, no. 2. — P. 133–139. Fractal properties of the long-period irregular np pulsations at the initial phase of 14 magnetic storms were studied based on the data of magnetic observations at the high-latitude Mirny observatory (φ = −77.2◦, λ = 122.6◦). The fractal dimensionality (D) of the np pulsations was determined using spectral analysis and the “critical exponents” method. An inverse correlation between D and the Dst variations is found. It is demonstrated that the fractal dimensionality of the np pulsations and, respectively, the pulsation field structure depend on the duration of the initial phase of the storm and the Dst-variation value. Possible influence of the intensity and action time of the DCF fields on the regime character (chaotic or regular) of the long-period irregular np pulsations at the initial phase of a storm is discussed. It is suggested that the np-pulsation fractal dimensionality may serve as an indicator of the magnetosphere disturbance degree.

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