[Ips-dhfpr] ASWFC Daily HF Prop Report - 02 October 25 issued 2330 UT on 02 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/02 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (02 OCTOBER) 
Date   T index  Conditions    
02 Oct   104    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.2    0209UT  possible   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 40% during local day.
      Enhanced by 30% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Depressed by 20% during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      109
Oct      89
Nov      89


2. FORECAST (03 OCTOBER - 05 OCTOBER)
Date   T index  Conditions       MUFs                              
03 Oct    95    Normal-fair      Near predicted monthly values 
                                 to 25% depressed
04 Oct    90    Normal           Near predicted monthly values 
                                 to 25% depressed    
05 Oct    90    Normal           Near predicted monthly values 
                                 to 25% depressed   

COMMENT: ASWFC HF Communications Warning 89 was issued on 2 October 
and is current for 2-4 Oct. Maximum usable frequencies (MUFs) 
in the Australian region on UT day 2-Oct were enhanced by 20 
in the northern regions and depressed by 20 in the southern regions. 
Sporadic-E was observed in Townsville, Hobart and Niue during 
local night hours. Conditions were degraded in Hobart. MUFs are 
expected to be near predicted values to 2 depressed over 3-5 
Oct, but on an improving trend. Conditions are likely to be mildly 
degraded during local night hours.

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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