Fig. 3


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Left: Kp for the period 2005–2015. Colors represent the NOAA scale of geomagnetic storms: quiet conditions (G0, green), minor/moderate conditions (G1/G2, yellow) and strong/severe/extreme conditions (G3/G4/G5, red). Black dashed curve reports the corresponding R12. Right: Relative percentage of the geomagnetic conditions according to the color code of the right panel.

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