[Ips-dhfpr] ASWFC Daily HF Prop Report - 12 February 25 issued 2330 UT on 12 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 FEBRUARY) 
Date   T index  Conditions    
12 Feb   101    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 25% during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
      Depressed by 20% after local dawn.
   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 (13 FEBRUARY - 15 FEBRUARY)
Date   T index  Conditions       MUFs                              
13 Feb   100    Normal           Near predicted monthly values
14 Feb    90    Normal-fair      Depressed 15%/near predicted 
                                 monthly values    
15 Feb    90    Normal           Depressed 15%/near predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 11-Feb in 
the Australian region were near predicted monthly values to 20% 
depressed, with worse conditions in the southern Australian region. 
Spread F was observed at Hobart during local night hours and 
sporadic E was observed at Cocos Islands, Hobart and Learmonth. 
MUFs are expected to be near predicted monthly values on 13-Feb. 
MUFs are expected to be near predicted monthly values to 15% 
depressed on 14-15 Feb due to an anticipated increase in geomagnetic 
activity. 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