[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2233 UT on 22 Apr 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 26/40
ISSUED AT 2232UT/22 APRIL 2026
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Ongoing effects of recent geomagnetic activity have caused maximum 
usable frequencies in the Australian region to be depressed by 
up to 25%. Depressions of 15-20% may persist over 23-Apr.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 23 APRIL 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
_____________________________________________________________
23 Apr:   52   -20%/normal      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