[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 February 25 issued 2330 UT on 13 Feb 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 FEBRUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 FEBRUARY) 
Date   T index  Conditions    
13 Feb   115    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    1109UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed by 25% 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 (14 FEBRUARY - 16 FEBRUARY)
Date   T index  Conditions       MUFs                              
14 Feb    90    Normal-fair      Depressed 15%/near predicted 
                                 monthly values
15 Feb    90    Normal           Depressed 15%/near predicted 
                                 monthly values    
16 Feb   100    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 21 was issued 
on 13 February and is current for 14-15 Feb. Maximum usable frequencies 
(MUFs) on UT day 11-Feb in the northern Australian region were 
near predicted monthly values to 15% enhanced. MUFs in the southern 
Australian region were near predicted monthly values to 25% depressed. 
Spread F was observed at Hobart. Sporadic E was observed at Hobart, 
Canberra, Cocos Islands and Norfolk Island. MUFs are expected 
to be near predicted monthly values to 15% depressed on 14-15 
Feb. MUFs are expected to be near predicted monthly values on 
16-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