[Ips-dhfpr] ASWFC Daily HF Prop Report - 26 December 25 issued 2330 UT on 26 Dec 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/26 DECEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (26 DECEMBER) 
Date   T index  Conditions    
26 Dec   128    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Nov      103
Dec      89
Jan      89


2. FORECAST (27 DECEMBER - 29 DECEMBER)
Date   T index  Conditions       MUFs                              
27 Dec   115    Normal           Near predicted monthly values 
                                 to 15% enhanced
28 Dec   115    Normal           Near predicted monthly values 
                                 to 15% enhanced    
29 Dec   115    Normal           Near predicted monthly values 
                                 to 15% enhanced   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 26-Dec were near predicted values to 25% enhanced. 
Mild depressions were observed after local dawn at some sites 
which are not expected to persist. MUFs are expected to be near 
predicted values to 15% enhanced over 27-29 Dec. 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