Making Sense of Sunspot Decay II: Deviations from the Mean Law and Plage Effects

K. Petrovay, V. Martinez-Pillet, L. van Driel-Gesztelyi

In a statistical analysis of Debrecen Photoheliographic Results sunspot area data we find that the logarithmic deviation (log D)' of the area decay rate D from the parabolic mean d…