[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0644 UT on 30 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/98
ISSUED AT 0644UT/30 OCTOBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Australian region MUFs are depressed by 15-25% on UT day 30-Oct, 
with the strongest depressions observed in southern Australian 
regions.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 30 OCTOBER 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS
       T-index      MUFs        2  4  6  8 12 16 22 26
_____________________________________________________________
30 Oct:   52          -15%      2  4  6  8 12 12 16 22

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