Solar Flare Occurrence Rate and Probability in Terms of the Sunspot Classification Supplemented with Sunspot Area and Its Changes

The Magnetic Polarity of Sun-Spots

George E. Hale, Ferdinand Ellerman, Seth B. Nicholson et al. · The Astrophysical Journal · 1919 · 772 citations

Magnetism, Solar Variability, Engineering +7

An emerging flux model for the solar flare phenomenon

J. Heyvaerts, E. R. Priest, D. M. Rust · The Astrophysical Journal · 1977 · 646 citations

The classification of sunspot groups

P. S. McIntosh · Solar Physics · 1990 · 370 citations

Engineering, Sunspot Groups, Solar Physic +3

The Dependence of Large Flare Occurrence on the Magnetic Structure of Sunspots

Ian Sammis, Frances Tang, H. Zirin · The Astrophysical Journal · 2000 · 267 citations

Engineering, Plasma Physics, δ Spots +17

Active-Region Monitoring and Flare Forecasting – I. Data Processing and First Results

P. T. Gallagher, Yong‐Jae Moon, Haimin Wang · Solar Physics · 2002 · 196 citations