[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 0024 UT on 17 Sep 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC PRELIMINARY HF RADIO COMMUNICATIONS WARNING 23/93
ISSUED AT 0023UT/17 SEPTEMBER 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

The expected depression in ionospheric frequencies of support 
during the interval 16-17 Sep associated with geomagnetic activity 
has failed to eventuate. However, degraded HF conditions are 
now expected on 19-20 Sep due to expected geomagnetic storm activity 
from a CME associated with a solar filament eruption which was 
observed on 16-Sep.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 19-20 SEPTEMBER 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