[Ips-hf-warning] ASWFC HF SHORTWAVE FADEOUT WARNING issued 0121 UT on 29 Jun 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 26/58
ISSUED AT 0120UT/29 JUNE 2026
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Active Region 4475 has produced several high C-class flares over 
the last 48 hours. M-class solar flares from this region, as 
well as magnetically complex region 4478 are possible over the 
next 48 hours. Shortwave fadeouts are possible.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 29-30 JUNE 2026
IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS
29 Jun:  R0-R1                Possible
30 Jun:  R0-R1                Possible

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