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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Statistical analysis of short-wave fadeout for extreme space weather event estimation

Fig. 2

a Seasonal variation in monthly averaged fmin as a function of month, b contour map of monthly averaged fmin values in MHz as a function of month and year, c averaged fmin as a function of LT (= UT + 9 h), and d contour map of fmin values in MHz as a function of LT and year. Vertical lines in a, c show the standard deviation, ± 1σ, and line colors distinguish the solar minima and two groups of solar maxima, as labeled in a

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