[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 January 26 issued 2330 UT on 16 Jan 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 JANUARY) 
Date   T index  Conditions    
16 Jan    83    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   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 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Dec      110
Jan      89
Feb      88


2. FORECAST (17 JANUARY - 19 JANUARY)
Date   T index  Conditions       MUFs                              
17 Jan    85    Normal-fair      Near predicted monthly values
18 Jan    75    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values    
19 Jan    70    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 9 was issued on 
15 January and is current for 15-17 Jan. Maximum Usable Frequencies 
(MUFs) in the Australian region were near predicted monthly values 
during UT day 16-Jan. Some enhancements were observed in the 
Cocos Islands, while depressions were observed in the Antarctic 
region. Mild sporadic E was observed in the southern Australian 
region, and some mild spread F was reported during local night 
hours in Hobart. MUFs are expected to remain near predicted monthly 
values over 17-Jan, but are forecast to become depressed by 10-15% 
on 18-19 Jan due to geomagnetic activity associated with a coronal 
hole high‑speed wind stream. Shortwave fadeouts and sporadic-E 
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