[Ips-hf-warning] ASWFC HF SHORTWAVE FADEOUT WARNING issued 2326 UT on 28 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/86
ISSUED AT 2326UT/28 SEPTEMBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

A group of new sunspot regions have been flare active and may 
produce radio blackouts at the R0-R1 level with some isolated 
R2 events.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 29 SEPTEMBER 2025 TO 01 OCTOBER 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS
29 Sep:  R0-R1, chance R2      Possible
30 Sep:  R0-R1, chance R2      Possible
01 Oct:  R0-R1, chance R2      Possible

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