[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 January 25 issued 2330 UT on 16 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 JANUARY) 
Date   T index  Conditions    
16 Jan   110    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
      Depressed 15-20% early in UT day.
   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 (17 JANUARY - 19 JANUARY)
Date   T index  Conditions       MUFs                              
17 Jan   105    Fair-normal      15% depressed to near predicted 
                                 monthly values
18 Jan   105    Fair-normal      15% depressed to near predicted 
                                 monthly values    
19 Jan   105    Fair-normal      15% depressed to near predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 8 was issued on 
16 January and is current for 17-19 Jan. Maximum usable frequencies 
(MUFs) in the Australian region on 16-Jan were depressed 15% 
to near predicted monthly values. Sporadic-E was observed at 
Hobart during local night hours. MUFs are expected to be depressed 
15% to near predicted values over 17-19 Jan due to mildly elevated 
geomagnetic activity associated with a coronal hole wind stream. 
Isolated 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