RADIO HABANA CUBA
"Dxers Unlimited" 
Solar Cycles 21, 22 and 23:
A Graphical Comparison

Solar cycle 23 was originally predicted to reach the same magnitude as cycle 21.   
A peak somewhere between 115 and 145 is more likely, based on the development of cycle 23. Cycle 22 is not a good comparison due to the unusually short time it took to reach its maximum.  

The X axis in the chart is the number of months since the cycle started, while the Y axis is the sunspot number. 
 
Monthly Sunspots
Cycle Smoothed
Actual
21 blue navy
22 black green
23 red magenta
 


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