[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0029 UT on 16 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/39
ISSUED AT 0028UT/16 APRIL 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

The Australian region ionospheric response to ongoing geomagnetic 
activity has been limited to depressions of up to 20% during 
the predawn period, with Hobart and Canberra only mildly depressed 
by 15% after dawn this morning. MUFs are expected to be depressed 
15-20% at times for the southern Australian region on 16-Apr. 
Northern Australian region MUFs are mostly expected to remain 
near normal.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 16 APRIL 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
_____________________________________________________________
16 Apr:   95   -15%/normal      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