Fig. 5.
From: Long-term behavior of annual and semi-annual Sq variations
Comparison between the sunspot number 
(three-year centered moving average) during the period 1953–2006 (the top panel) with the phases of 
and 
. Note that, in the middle and bottom panels, the solid lines indicate the Kakioka data while the broken lines indicate the Gnangara data. Also, note that, in the middle panel, the horizontal broken line indicates the day of the June solstice for the Kakioka data (the left vertical axis) and the day of the December solstice for the Gnangara data (the right vertical axis).