[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2208 UT on 05 Apr 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/34
ISSUED AT 2207UT/05 APRIL 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Southern Australian region MUFs are depressed 20-30% after local 
dawn this morning following geomagnetic activity induced by a 
coronal hole wind stream. Northern Australian region MUFs are 
currently near predicted monthly values. Southern Australian 
region MUFs may gradually recover later today.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 06 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
_____________________________________________________________
06 Apr:   70        -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