Figure 2 | Solar Physics

Figure 2

From: Overlapping Magnetic Activity Cycles and the Sunspot Number: Forecasting Sunspot Cycle 25 Amplitude

Figure 2

Inferred latitude versus time evolution of the magnetic activity bands and termination events of the 22-year Hale cycle over the past 22 years. Top: Hemispheric and total sunspot number of the recent Cycles 23 and 24. Vertical lines show the termination events of Solar Cycles 22, 23, and (predicted) 24, which are followed by a rapid rise in solar activity. Bottom: A conceptual drawing of the hypothesized activity bands of M2014 that are the underlying structure of the extended solar cycle. The indicated separation between the Solar Cycle 22 and 23 terminators provides a predictor for the Solar Cycle 24 amplitude, while likewise the separation between the observed Solar Cycle 23 terminator and the predicted Solar Cycle 24 terminator provides a method to forecast Solar Cycle 25. The numbered tags in the upper panel are illustrative for the reader and the two experiments that we will conduct below.

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