Geomagnetic activity and solar cycles

Probable Value for the Next Sunspot Minimum

“…To analyze SMMS, Gumbel's asymptotic distributions [12] are considered. They were applied by Siscoe [13,14] and Silbergleit et al [15,16] to study sunspots in each solar cycle and the largest geomagnetic storms. Analytic expressions are obtained for extreme value populations from which the statistical parameters-mode, median, mean, and standard deviation-are derived.…”

Probable Values of Current Solar Cycle Peak

“…So far we have not produced theories that combine these mechanisms in a model, then we are necessitated to predict solar activity by statistical methods that depend on determining correlations between past and future behavior. Numerous studies to predict the maximum solar activity level have been published (e.g., [1][2][3][4][5][6]). The general trend observed in recent solar activity cycles is toward larger amplitude sunspot cycles.…”