[Ips-hf-warning] ASWFC HF SHORTWAVE FADEOUT WARNING issued 0424 UT on 27 Dec 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/124
ISSUED AT 0423UT/27 DECEMBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

A new spot group appears to be emerging on the solar disk in 
the southeast solar quadrant and has produced an M5.1 flare. 
The spots are currently small. However, further flare activity 
may follow if the solar region continues to grow. In addition 
a new solar region has rotated onto the disk over the northeast 
solar limb.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 27-29 DECEMBER 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS
27 Dec:  R1, chance R2        Possible
28 Dec:  R1, chance R2        Possible
29 Dec:  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