[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 September 25 issued 2330 UT on 16 Sep 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 SEPTEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 SEPTEMBER) 
Date   T index  Conditions    
16 Sep    96    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 30% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      96
Sep      92
Oct      90


2. FORECAST (17 SEPTEMBER - 19 SEPTEMBER)
Date   T index  Conditions       MUFs                              
17 Sep   100    Normal           Near predicted monthly values
18 Sep   100    Normal           Near predicted monthly values    
19 Sep   100    Normal           Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 84 was issued on 15 
September and is current for 15-17 Sep. Maximum usable frequencies 
(MUFs) on UT day 16-Sep were mostly near predicted values. Spread-F 
was observed in Perth and Hobart during local night hours. MUFs 
are expected to be near predicted values on 17-19 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