Solar flare blacks out shortwave radio, more flares possible this weekend

A potent X1-class solar flare 11/7 caused a strong HF radio blackout. More X-flares are possible this weekend, as a sunspot turns toward Earth, according to

Ironically, a solar-induced blackout is the scenario for tomorrow’s simulated emergency test by ham radio operators of the Indiana section American Radio Relay League Amateur Radio Emergency Service and National Traffic System.

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