First X-Class Major Solar Flare of Solar Cycle 25 Blacks Out HF on July 3

[ARRL]

A lot of radio amateurs may have been wondering, “Where did the bands go?” as the first X-class solar flare in 4 years blacked out HF propagation for a time on July 3.


“Many American radio amateurs reported sudden HF propagation blackouts on Saturday morning, July 3, when solar active region 12838 produced an X1.5 major solar flare that reached maximum intensity at 1429 UTC, the first X-class s...

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