[Ips-dhfpr] ASWFC Daily HF Prop Report - 05 December 25 issued 2330 UT on 05 Dec 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/05 DECEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 DECEMBER) 
Date   T index  Conditions    
05 Dec   116    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   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
Nov      103
Dec      89
Jan      89


2. FORECAST (06 DECEMBER - 08 DECEMBER)
Date   T index  Conditions       MUFs                              
06 Dec   105    Normal           Near predicted monthly values
07 Dec   105    Normal           Near predicted monthly values    
08 Dec   105    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 116 was issued on 
5 December and is current for 5-6 Dec. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 5-Dec were near predicted 
monthly values. Mild depressions of 15% were observed after local 
dawn at Hobart and Canberra which are not expected to persist. 
MUFs are expected to be near predicted monthly values over 6-8 
Dec.

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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