[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 September 26 issued 2330 UT on 28 Sep 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 SEPTEMBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 SEPTEMBER) 
Date   T index  Conditions    
28 Sep    49    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      66
Sep      62
Oct      60


2. FORECAST (29 SEPTEMBER - 01 OCTOBER)
Date   T index  Conditions       MUFs                              
29 Sep    55    Normal           Near predicted monthly values
30 Sep    55    Normal           Near predicted monthly values    
01 Oct    55    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) were mostly near predicted 
values in the Southern Australian and Antarctic regions on UT 
28-Sep. Depressions of 15% were observed in the Northern Australian 
region during local daylight hours, with depressions also observed 
at local dawn. Depressions of 20% were also observed at Niue 
Island. Mild spread-F was observed in Hobart. MUFs are forecast 
to be near predicted values over the period 29-Sep to 01-Oct.

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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