[Ips-hf-warning] ASWFC HF DEPRESSION WARNING issued 2253 UT on 21 Nov 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC HF RADIO COMMUNICATIONS WARNING 23/116
ISSUED AT 2253UT/21 NOVEMBER 2023
BY THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE.

Australian region MUFs are depressed 15-25% after local dawn 
this morning, probably in association with mild geomagnetic activity 
from a small coronal hole wind stream.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 22 NOVEMBER 2023
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS
       T-index      MUFs        2  4  6  8 12 16 22 26
_____________________________________________________________
22 Nov:   70   -20%/normal      2  4  6  8 12 12 16 22

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