[Ips-dhfpr] ASWFC Daily HF Prop Report - 15 January 25 issued 2330 UT on 15 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/15 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 JANUARY) 
Date   T index  Conditions    
15 Jan   124    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Depressed by 20% after local dawn.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed 15% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.
   

PCA Event : No event.

Monthly T index:
Month  T index
Dec      132
Jan      119
Feb      116


2. FORECAST (16 JANUARY - 18 JANUARY)
Date   T index  Conditions       MUFs                              
16 Jan    95    Fair-normal      15% depressed to near predicted 
                                 monthly values
17 Jan   105    Fair-normal      15% depressed to near predicted 
                                 monthly values    
18 Jan   105    Fair-normal      15% depressed to near predicted 
                                 monthly values   

COMMENT: ASWFC HF Communications Warning 7 was issued on 15 January 
and is current for 16 Jan only. Maximum usable frequencies (MUFs) 
in the Australian region on 15-Jan were generally near predicted 
values becoming depressed by 15-20% after local dawn this morning. 
Mild spread F and strong sporadic-E was observed at Hobart during 
local night hours. MUFs are expected to be depressed 15% to near 
predicted values over 16-18 Jan due to mildly elevated geomagnetic 
activity associated with a coronal hole wind stream. Isolated 
minor 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