Fractal dimension algorithms and their application to time series associated with natural phenomena

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Abstract

Chaotic invariants like the fractal dimensions are used to characterize non-linear time series. The fractal dimension is an important characteristic of systems, because it contains information about their geometrical structure at multiple scales. In this work, three algorithms are applied to non-linear time series: spectral analysis, rescaled range analysis and Higuchi's algorithm. The analyzed time series are associated with natural phenomena. The disturbance storm time (Dst) is a global indicator of the state of the Earth's geomagnetic activity. The time series used in this work show a self-similar behavior, which depends on the time scale of measurements. It is also observed that fractal dimensions, D, calculated with Higuchi's method may not be constant over-all time scales. This work shows that during 2001, D reaches its lowest values in March and November. The possibility that D recovers a change pattern arising from self-organized critical phenomena is also discussed.

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La Torre, F. C. D., González-Trejo, J. I., Real-Ramírez, C. A., & Hoyos-Reyes, L. F. (2013). Fractal dimension algorithms and their application to time series associated with natural phenomena. In Journal of Physics: Conference Series (Vol. 475). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/475/1/012002

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