[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0139 UT on 22 Apr 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 23/38
ISSUED AT 0138UT/22 APRIL 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

A CME impact is expected on 23-Apr due to a halo CME first observed 
on 21-Apr. The increased geomagnetic activity is expected to 
cause HF depressions of up to 15% over 23-24 Apr.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 23-24 APRIL 2023
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