[Ips-hf-warning] ASWFC HF SHORTWAVE FADEOUT WARNING issued 0733 UT on 29 Jul 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 23/72
ISSUED AT 0731UT/29 JULY 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Several complex sunspot regions on the solar disk suggest solar 
activity may be R1 with a chance of R2. Shortwave fadeouts are 
possible. Polar cap absorption is possible over this period due 
to enhanced proton flux, possibly causing degraded HF conditions 
in high latitude areas.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 28-30 JULY 2023
IF COMMS DIFFICULTIES EXPERIENCED TRY A HIGHER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS
28 Jul:  R0-R1, chance R2        Possible
29 Jul:  R0-R1, chance R2        Possible
30 Jul:  R0-R1, chance R2        Possible

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