[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 September 22 issued 2331 UT on 21 Sep 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 SEPTEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 SEPTEMBER) 
Date   T index  Conditions    
21 Sep    78    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0702UT  possible   lower  Mid East/Indian

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 40% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 40% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      53
Sep      68
Oct      69


2. FORECAST (22 SEPTEMBER - 24 SEPTEMBER)
Date   T index  Conditions       MUFs                              
22 Sep    75    Normal-fair      Near predicted monthly values
23 Sep    75    Normal-fair      Near predicted monthly values    
24 Sep    75    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 72 was issued on 
21 September and is current for 21-23 Sep. Maximum usable frequencies 
(MUFs) on UT day 21-Sep were near predicted monthly values to 
15-40% enhanced in Northern Australia. Regional MUFs are expected 
to be near predicted monthly values over 22-24 Sep, with mild 
depressions/degradations possible for southern Australian region 
during local night and briefly after local dawn due to coronal 
hole high speed wind stream effects.

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For an explanation of some of the terms in this report, go to
https://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

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