[Ips-dhfpr] ASWFC Daily HF Prop Report - 26 September 23 issued 2334 UT on 26 Sep 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/26 SEPTEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (26 SEPTEMBER) 
Date   T index  Conditions    
26 Sep   129    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 30% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      115
Sep      96
Oct      93


2. FORECAST (27 SEPTEMBER - 29 SEPTEMBER)
Date   T index  Conditions       MUFs                              
27 Sep    95    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values
28 Sep   115    Normal           10 to 15% above predicted monthly 
                                 values    
29 Sep   115    Normal           10 to 15% above predicted monthly 
                                 values   

COMMENT: ASWFC SWF HF Communications Warning 100 was issued on 
24 September and is current for 25-27 Sep. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 26-Sep were near predicted 
monthly values to 30% enhanced. Spread F was observed at Hobart 
last night and MUFs at Hobart are depressed 15-20% after local 
dawn this morning, following mild overnight geomagnetic activity. 
Other southern region sites are currently near normal. MUFs are 
generally expected to be near monthly predicted values to 15% 
enhanced over 27-29 Sep, with brief mild depressions early in 
the UT day on 27-Sep for the southern Australian region. Isolated 
minor shortwave fadeouts are possible.

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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