Top panel: Comparison between the area fraction of plages and enhanced network, A_PEN, seen from the northern hemisphere (green) and from the southern hemisphere (red). The curves are the monthly averaged data smoothed with a 13-month sliding window. Bottom panel: International Sunspot Number (ISN), hemispheric 13-month smoothed number. Green parts represent an excess of activity in the northern hemisphere while red parts represent an excess in the southern hemisphere. Credit: SILSO (Royal Observatory of Belgium).