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Fig. 9 | Earth, Planets and Space

Fig. 9

From: Solar flare effects on D-region ionosphere using VLF measurements during low- and high-solar activity phases of solar cycle 24

Fig. 9

Ionospheric D-region parameters H′ and β, determined as functions of solar X-ray flare power from the mean VLF amplitude and phase perturbations of selected flare power bins of Fig. 8 during the low- and moderate-solar activity periods. The points plotted in red and their best-fit lines correspond to low solar activity, while the points plotted in blue and their best-fit lines correspond to moderate-solar activity periods

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