This report presents first steps at applying chaos theory to the solar activity cycle. We provide brief reviews of the history of sunspot records, the mathematical framework of chaos theory, and solar dynamo theory. Finally, we present results of nonlinear analysis of solar motion and propose that further research focus on characterizing local Lyapunov exponents of solar dynamics.

Up to now, the periodic behaviour of the N-S asymmetry of solar activity has been analyzed by applying the power spectrum analysis to the time series generated from a normalized definition of the asymmetry. Using sunspot areas and the properties of the discrete Fourier transform, we show that the use of the normalized time series leads to misleading results, and that the correct asymmetry time ...

This long-term study examined relationships between solar and magnetic factors and the time course and lags of autonomic nervous system (ANS) responses to changes in solar and geomagnetic activity. Heart rate variability (HRV) was recorded for 72 consecutive hours each week over a five-month period in 16 participants in order to examine ANS responses during normal background environmental perio...

Probing the structure and rotation of the solar core is one of the greatest challenges to helioseismology. We show that the seismic information in the observed low degree solar oscillations which probe the core is severely contaminated. This contamination arises from theSun’s near surfacemagnetic activity. The effect on the oscillation frequencies varies with the solar cycle–vanishing at solar ...

The solar limb brightening has also been earlier studied in various microwave frequencies [1-4] and also in Extreme Ultraviolet (EUV) region [5,6]. The observations of solar limb brightening have highly variations and sometimes they have given even contradictory results. Several authors have reported the absence of limb brightening (such as [7]) at 35 GHz. This study focuses on studying limb br...