[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0116 UT on 12 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/92
ISSUED AT 0115UT/12 OCTOBER 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Australian region MUFs are 15-30% depressed on UT day 11-Oct. 
The strongest depressions are in southern Australian regions. 
These depressions are likely associated with mildly elevated 
geomagnetic activity and may continue into UT day 13-Oct.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 12-13 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
_____________________________________________________________
12 Oct:   40          -20%      2  4  6  8  8 12 16 16
13 Oct:   51          -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