[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0718 UT on 18 Feb 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 26/23
ISSUED AT 0718UT/18 FEBRUARY 2026
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Southern Australian region MUFs are depressed by 15-25% on UT 
day 18-Feb, affecting upper HF bands. Northern Australian MUFs 
are mostly near predicted monthly values.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 18 FEBRUARY 2026
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
_____________________________________________________________
18 Feb:   37          -20%      2  4  6  8  8 12 16 16

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