[Ips-hf-warning] ASWFC HF SHORTWAVE FADEOUT WARNING issued 2316 UT on 25 Apr 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 26/42
ISSUED AT 2316UT/25 APRIL 2026
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Solar flare activity is expected to be at R1-R2 levels over 26-28 
Apr due to the magnetic complexity of regions 4420, 4423 and 
possible beyond-the-limb flares from region 4419. Shortwave fadeouts 
are possible.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 26-28 APRIL 2026
IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS
26 Apr:  R1-R2                    Possible
27 Apr:  R1-R2                    Possible
28 Apr:  R1-R2                    Possible

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au