[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 October 26 issued 2330 UT on 04 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 OCTOBER) 
Date   T index  Conditions    
04 Oct    64    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Mostly near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      61
Oct      60
Nov      58


2. FORECAST (05 OCTOBER - 07 OCTOBER)
Date   T index  Conditions       MUFs                              
05 Oct    50    Normal-fair      Depressed 10%/near predicted 
                                 monthly values
06 Oct    60    Normal           Near predicted monthly values    
07 Oct    60    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) in the Australian 
region were mostly near predicted values over 04-Oct, with some 
depressions observed at Hobart and Canberra late in the UT day. 
Sporadic E was present in northern Australian sites during local 
night hours, and strong spread F was observed at Hobart and Niue. 
Ionospheric scintillation was also observed at Niue between 04/0752-0820UT, 
with the eightieth percentile S4 reaching 0.55. MUFs in the Australian 
region are forecast to be mildly depressed on 05-Oct, with depressions 
of up to 10% possible in the southern Australian region, before 
trending toward predicted monthly values over 06-07 Oct as the 
current geomagnetic activity abates.

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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