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Frank Donovan, W3LPL, says the long-anticipated significant increase in Solar Cycle 25 activity may have begun on April 19. “As a result, 30- and 20-meter nighttime propagation and 17- and 15-meter daytime propagation is likely to be enhanced through at least April 26. The solar flux index (SFI) is likely to remain at 85 or higher through at least April 26 due to two active regions on the sun’s...
Source: http://www.arrl.org/news/view/upswing-i ... have-begun
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