[Ips-dhfpr] ASWFC Daily HF Prop Report - 03 October 25 issued 2333 UT on 03 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/03 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 OCTOBER) 
Date   T index  Conditions    
03 Oct   114    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M1.5    0523UT  possible   lower  E. Asia/Aust.
  M1.2    1436UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 50% during local day.
      Enhanced by 45% during local night.
   Niue Island Region:
      Enhanced by 50% during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Generally near predicted monthly 
      values during local day, with MUFs
      at Hobart depressed 20% and MUFs at Perth
      enhanced by 30%.
      Depressed 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
Sep      109
Oct      89
Nov      89


2. FORECAST (04 OCTOBER - 06 OCTOBER)
Date   T index  Conditions       MUFs                              
04 Oct   105    Fair-normal      Near predicted monthly values 
                                 to 15% enhanced
05 Oct   105    Normal           Near predicted monthly values 
                                 to 15% enhanced    
06 Oct   105    Normal           Near predicted monthly values 
                                 to 15% enhanced   

COMMENT: ASWFC HF Communications Warning 89 was issued on 2 October 
and is current for 2-4 Oct. ASWFC SWF HF Communications Warning 
90 was issued on 3 October and is current for 3-4 Oct. Maximum 
usable frequencies (MUFs) in the Australian region on UT day 
03-Oct were variable. MUF enhancements of up to by 20% were observed 
in the northern Australian region. MUFs at Hobart were depressed 
by up to 20% during the local day, with other southern region 
sites near predicted monthly values. MUFs at Perth were 30% enhanced 
during the local day. Spread F was observed at Hobart and Canberra 
during local night hours. MUFs are expected to be near predicted 
monthly values to 15% enhanced over 04-06 Oct.

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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