HF Fadeout Warning

(last updated 10 Dec 2025 11:10 UT)

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/120 ISSUED AT 0231UT/09 DECEMBER 2025 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE. R2-R3 radio blackouts are probable over the next few days due to active sunspot regions. DEGRADED HF PROPAGATION CONDITIONS EXPECTED FROM 09-11 DECEMBER 2025 IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND _____________________________________________________________ SOLAR ACTIVITY FORECAST HF COMMS FADEOUTS 09 Dec: R2-R3 Probable 10 Dec: R2-R3 Probable 11 Dec: R2-R3 Probable