RADIO HABANA CUBA
"Dxers Unlimited" 
Solar Cycles 10, 13, 17, 20 and 23:
A Graphical Comparison

 
Solar cycles 10, 13, 17 and 20 are those that most easily compare to the development of cycle 23. The chart below displays the development of all those cycles during their first 5 years.

The X axis in the chart is the number of months since the cycle started, while the Y axis is the international monthly smoothed sunspot number.
 
Cycle
Monthly_Smoothed Sunspot Number 
10 magenta
13
blue
17
black
20 aqua
23 red
 


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