[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 February 25 issued 2330 UT on 17 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 FEBRUARY) 
Date   T index  Conditions    
17 Feb   128    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    1513UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   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      124
Feb      118
Mar      115


2. FORECAST (18 FEBRUARY - 20 FEBRUARY)
Date   T index  Conditions       MUFs                              
18 Feb   120    Normal           Near predicted monthly values
19 Feb   125    Normal           Near predicted monthly values    
20 Feb   130    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 17-Feb in 
the Australian region were near predicted monthly values with 
depressions of up to 15% observed in the southern Australian 
region. Spread F was observed at Hobart and Perth during local 
night hours. MUFs are expected to be near predicted monthly values 
over 18-20 Feb. 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