[Ips-dhfpr] ASWFC Daily HF Prop Report - 15 September 26 issued 2330 UT on 15 Sep 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/15 SEPTEMBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 SEPTEMBER) 
Date   T index  Conditions    
15 Sep    70    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 30% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% 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 (16 SEPTEMBER - 18 SEPTEMBER)
Date   T index  Conditions       MUFs                              
16 Sep    50    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%
17 Sep    55    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%    
18 Sep    65    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 15-Sep were near predicted monthly values, with 
enhanced conditions observed in the northern Australian region 
during local night hours. Spread F was observed at Hobart during 
local night hours. MUFs are expected to be near predicted monthly 
values to depressed by up to 15% over 16-17 Sep, due to anticipated 
geomagnetic activity. Depressions are more likely in the southern 
Australian region. MUFs are expected to be near predicted monthly 
values on 18-Sep.

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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