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FORECAST SOL: Moderate yellow MAG: Moderate yellow ION: Moderate yellow
HomeHF SystemsGlobal HFHF ConditionsHF Fadeout Warning Tuesday, Jul 21 2026 08:44 UT
Global HF

HF Fadeout Warning

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(last updated 21 Jul 2026 08:40 UT)

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 26/66 ISSUED AT 0145UT/21 JULY 2026 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE. Active region 4493 has shown significant growth and produced several M-class flares over the past 24 hours. Further M-class flares are forecast. Shortwave fadeouts are possible. DEGRADED HF PROPAGATION CONDITIONS EXPECTED FROM 21-22 JULY 2026 IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND _____________________________________________________________ SOLAR ACTIVITY FORECAST HF COMMS FADEOUTS 21 Jul: R1, chance of R2 Possible 22 Jul: R1, chance of R2 Possible

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