[Ips-hf-warning] ASWFC HF SHORTWAVE FADEOUT WARNING issued 2258 UT on 24 Sep 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 23/100
ISSUED AT 2257UT/24 SEPTEMBER 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Multiple magnetically complex sunspot regions, with histories 
of M-class flaring, are currently present on the solar disk. 
The most significant region is currently approaching a geoeffective 
position.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 25-27 SEPTEMBER 2023
IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS
25 Sep:  R1-R2, chance of R3  Probable
26 Sep:  R1-R2, chance of R3  Probable
27 Sep:  R1-R2, chance of R3  Probable

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