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Figure 3 Composite 2800 MHz solar microwave flux (thin-black curve) built from Canadian 2800 MHz flux (red curve), scaled Japanese 3750 MHz flux (green curve), and scaled Japanese 2000 MHz flux (blue curve), Svalgaard (2010). The match is so good that it is difficult to see the individual curves as they fall on top of each other. Note that the values at each sunspot minimum are very similar, without any long-term trend or inter-cycle variation. The green box shows that the flux is very nearly constant at all solar minima.

Erratum to: Reconstruction of Solar Extreme Ultraviolet Flux 1740 – 2015