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

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 JANUARY) 
Date   T index  Conditions    
25 Jan   137    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 55% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

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


2. FORECAST (26 JANUARY - 28 JANUARY)
Date   T index  Conditions       MUFs                              
26 Jan   120    Normal-fair      Near predicted monthly values
27 Jan   120    Fair-normal      Near predicted monthly values    
28 Jan   120    Normal           Near predicted monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 12 was issued 
on 23 January and is current for 24-26 Jan. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 25-Jan were near predicted 
monthly values. Mild spread F was observed at Hobart during local 
night hours. Sporadic E was observed at Townsville and Brisbane. 
The CME arrival expected on 25-Jan has not yet eventuated. MUFs 
are expected to be near predicted monthly values. Mildly degraded 
HF conditions may be experienced on 27-Jan if CME induced geomagnetic 
activity eventuates.

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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