[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 January 25 issued 2330 UT on 28 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 JANUARY) 
Date   T index  Conditions    
28 Jan   134    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.7    1945UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Near predicted monthly values.
   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 (29 JANUARY - 31 JANUARY)
Date   T index  Conditions       MUFs                              
29 Jan   140    Normal           Near predicted monthly values 
                                 to 10-15% depressed
30 Jan   150    Normal           Near predicted monthly values 
                                 to 10% enhanced    
31 Jan   160    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region were near predicted values. Sporadic-E was observed in 
Canberra during local night hours. MUFs are expected to be near 
predicted values to 10-15% depressed on 29-Jan due to prolonged 
southward solar wind conditions. MUFs are likely to improve to 
become mildly enhanced on 30-Jan. Due to the expected onset of 
a pair of coronal holes, MUFs may become depressed by the end 
of 31-Jan, however it is more likely depressions will become 
more pronounced by 1-Feb or later.

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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