[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0149 UT on 23 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 25/12
ISSUED AT 0149UT/23 JANUARY 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Due to anticipated geomagnetic activity over 24-25 Jan due to 
two coronal mass ejections, HF radio conditions are expected 
to become degraded over 24-26 Jan. Maximum usable frequencies 
may become depressed by 10-15% over this period.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 24-26 JANUARY 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
A MORE DETAILED HF WARNING WILL FOLLOW IF DEPRESSIONS EVENTUATE.
_____________________________________________________________

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