[Ips-dhfpr] ASWFC Daily HF Prop Report - 31 January 25 issued 2330 UT on 31 Jan 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/31 JANUARY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (31 JANUARY) 
Date   T index  Conditions    
31 Jan   158    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0610UT  possible   lower  Mid East/Indian
  M6.7    1406UT  probable   lower  South American/
                                    Atlantic
  M1.8    2023UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   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 (01 FEBRUARY - 03 FEBRUARY)
Date   T index  Conditions       MUFs                              
01 Feb   120    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 15%
02 Feb   105    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values    
03 Feb   130    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 14 was issued on 
31 January and is current for 1-3 Feb. Maximum usable frequencies 
(MUFs) in the Australian region were near predicted values to 
35% enhanced on UT day 31-Jan. Mild spread-F was observed at 
Hobart during local night hours. Southern Australian region MUFs 
were 20% enhanced after local dawn. Southern Australian MUFs 
are expected to be near predicted monthly values to 10-15% depressed 
over 01-02 Feb due to a mild increase in geomagnetic activity. 
MUFs are expected to be near predicted monthly values on 03-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