[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 September 22 issued 2331 UT on 23 Sep 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 SEPTEMBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 SEPTEMBER) 
Date   T index  Conditions    
23 Sep    78    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.7    1810UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   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 (24 SEPTEMBER - 26 SEPTEMBER)
Date   T index  Conditions       MUFs                              
24 Sep    70    Normal-fair      Near predicted monthly values
25 Sep    70    Normal-fair      Near predicted monthly values    
26 Sep    70    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 73 was issued on 
23 September and is current for 24-26 Sep. Maximum usable frequencies 
(MUFs) on UT day 22-Sep were near predicted monthly values to 
30% enhanced in Northern Australia. Spread F was observed during 
local night hours at Hobart and Perth. Hobart MUFs are currently 
trending to a 15% depression at 23/2300UT. Regional MUFs are 
expected to be near predicted monthly values over 24-26 Sep, 
with mild depressions/degradations possible for southern Australia 
during local night and briefly after local dawn due to possible 
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