[Ips-dhfpr] ASWFC Daily HF Prop Report - 19 February 25 issued 2330 UT on 19 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/19 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 FEBRUARY) 
Date   T index  Conditions    
19 Feb   144    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 20-25%.
   Niue Island Region:
      Enhanced by 40% during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Enhanced by 15-30% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.
      Strong spread F observed at times.

PCA Event : No event.

Monthly T index:
Month  T index
Jan      124
Feb      118
Mar      115


2. FORECAST (20 FEBRUARY - 22 FEBRUARY)
Date   T index  Conditions       MUFs                              
20 Feb   145    Normal           Near to 15% above predicted 
                                 monthly values
21 Feb   145    Normal           Near to 15% above predicted 
                                 monthly values    
22 Feb   145    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 19-Feb in 
the Australian region were near predicted monthly values with 
southern Australian region MUFs becoming enhanced by up to 15-30% 
after local dawn this morning. Mild spread F was observed at 
Hobart during local night hours. MUFs are expected to be near 
predicted monthly values to 15% enhanced over 20-22 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