Figure 9

Regression of Geomagnetic aa-index on Rainfall in ABD during Solar Cycles 22–24. From the Regression Equation, a change in Geomagnetic aa-index by 1 nT caused a decrease in Rainfall by 0.3073 mm, with percentage variability of mere 0.13%. These values are too low for classification of Geomagnetic aa-index as a forcing on climate change in the study area.