[Ips-hf-warning] ASWFC HF SHORTWAVE FADEOUT WARNING issued 0043 UT on 02 Dec 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/114
ISSUED AT 0040UT/02 DECEMBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

There currently exists a heightened risk of X-class flares due 
to the presence of a number of active regions of interest. AR4299 
produced an X1.9 flare on 01-Dec, and is believed to be the same 
region as AR 4274, from the previous solar rotation. This region 
was previously associated with significant flaring activity. 
In addition, there are several large sunspots currently located 
South-East that have the potential to result in flares.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 02-04 DECEMBER 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS
02 Dec:  R2-R3                Possible
03 Dec:  R2-R3                Possible
04 Dec:  R2-R3                Possible

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