[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0625 UT on 31 May 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 25/56
ISSUED AT 0625UT/31 MAY 2025
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

A halo CME is expected to impact Earth on 01-Jun at 2100 hours 
+/- 8 hours. The anticipated geomagnetic activity from this impact 
is expected to degrade HF communications in the Australian region 
over the following days.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 02-04 JUNE 2025
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
A MORE DETAILED HF WARNING WILL FOLLOW IF DEPRESSIONS EVENTUATE.
_____________________________________________________________

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