Sunspots. The model of “elastic sceletons”. Estimation of sunspot umbra fractal dimension
O. V. Chumak, Z. N. Chumak · Astronomical and Astrophysical Transactions · 1996
On the basis of observational data, we estimated the fractal dimension of the solar spot umbras is made. The estimation is obtained using the method of “cross-section area – outline length” and it is equal to 1.35 ± 0.03. This value of the fractal dimension corresponds to turbulent structures of the “elastic sceletons” type.