24 citations · 24 across the 2 of their papers we have counts for
2 papers
astro-ph.SR2023
A Remarkably Accurate Predictor of Sunspot Cycle Amplitude
Peter Foukal
The slopes of the linear relations between sunspot and white light (WL) facular areas at the onset of sunspot Cycles 12-21 correlate well with the amplitudes of those cycles betwee…
astro-ph.SR2018★ 24 cited
The umbra-penumbra area ratio of sunspots during the Maunder Minimum
V. M. S. Carrasco, J. M. García-Romero, J. M. Vaquero +4
The Maunder Minimum (MM) was a prolonged period of low solar activity that occurred between 1645 and 1715. The true level of solar activity corresponding to this epoch is still a m…