[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 January 26 issued 2330 UT on 04 Jan 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 JANUARY) 
Date   T index  Conditions    
04 Jan   139    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.
   Northern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 40% during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 20% 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
Dec      110
Jan      89
Feb      88


2. FORECAST (05 JANUARY - 07 JANUARY)
Date   T index  Conditions       MUFs                              
05 Jan    70    Fair-normal      Depressed 5 to 10%/near predicted 
                                 monthly values
06 Jan   105    Normal-fair      Near predicted monthly values    
07 Jan   100    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 3 was issued on 
4 January and is current for 4-5 Jan. Maximum usable frequencies 
(MUFs) were enhanced 15-25% compared with predicted monthly values 
during UT day 04-Jan in the Australian region, with enhancements 
up to 40% observed in the northern Australian region during local 
night hours. MUFs were near predicted monthly values at Niue 
Island as well as the Antarctic region. Strong low-frequency 
sporadic-E was observed across the Australian region during local 
night hours, with mild spread F observed in the southern Australian 
region. MUFs are forecast to be up to 10% depressed on 05-Jan 
due to a recent CME arrival. These conditions are expected to 
improve over 06-07 Jan as these effects abate. Shortwave fadeouts 
are possible, and sporadic-E may be observed during local night 
hours.

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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