[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0042 UT on 07 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 25/69
ISSUED AT 0041UT/07 JULY 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Recent G1 geomagnetic activity, coupled with ongoing depressions, 
may cause further ionospheric depressions to maximum usable frequencies 
(MUFs) in the Australian region. HF radio propagation conditions 
in the Australian region are expected to be degraded during local 
night hours.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 07-08 JULY 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
_____________________________________________________________
07 Jul:   80   normal/-15%      2  4  6  8 12 12 16 22
08 Jul:   90   normal/-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