[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 January 26 issued 2330 UT on 22 Jan 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 JANUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 JANUARY) 
Date   T index  Conditions    
22 Jan    85    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 35% during local day.
      Depressed by 25% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 55% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 2240UT 18/01, Ended at 1640UT 21/01

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


2. FORECAST (23 JANUARY - 25 JANUARY)
Date   T index  Conditions       MUFs                              
23 Jan    70    Normal-fair      Near predicted monthly values
24 Jan    80    Normal           Near predicted monthly values    
25 Jan    81    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 14 was issued on 
21 January and is current for 21-23 Jan. Ionospheric conditions 
continued to recover in the Australian region on UT day 22-Jan 
following the coronal mass ejection impact with Earth on 19-Jan. 
Maximum Usable Frequencies (MUFs) in the Australian region trended 
towards near predicted monthly values over the UT day, with some 
enhancements seen in northern Australia and Niue Island. Strong 
sporadic E was visible during night hours in southern Australia, 
and spread F was observed in Hobart. MUFs will continue to trend 
towards predicted monthly values over 23-25 Jan, with some enhancements 
possible. Sporadic E may be observed during local night hours, 
and 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