[Ips-dhfpr] ASWFC Daily HF Prop Report - 18 February 26 issued 2330 UT on 18 Feb 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 FEBRUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 FEBRUARY) 
Date   T index  Conditions    
18 Feb    87    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Depressed by 15% 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 : No event.

Monthly T index:
Month  T index
Jan      96
Feb      88
Mar      87


2. FORECAST (19 FEBRUARY - 21 FEBRUARY)
Date   T index  Conditions       MUFs                              
19 Feb    95    Normal           Near predicted monthly values
20 Feb    95    Normal           Near predicted monthly values    
21 Feb    95    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) on UT day 18-Feb in 
the Australian region were near predicted monthly values with 
moderate depressions observed during local day in the southern 
Australian region and moderate enhancements observed during local 
night in the northern Australian region. Spread F and sporadic 
E were observed at Hobart during local night hours. MUFs are 
expected to be near predicted monthly values over 19-21 Feb.

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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