HF Fadeout Warning

(last updated 21 May 2025 09:00 UT)
SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/50 ISSUED AT 0316UT/21 MAY 2025 BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE. Multiple active regions recently rotated over the eastern limb, some of which have produced R1 level flares. Shortwave fadeouts are possible. DEGRADED HF PROPAGATION CONDITIONS EXPECTED FROM 21-23 MAY 2025 IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND _____________________________________________________________ SOLAR ACTIVITY FORECAST HF COMMS FADEOUTS 21 May: R0-R1 Possible 22 May: R0-R1 Possible 23 May: R0-R1 Possible