[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 October 26 issued 2332 UT on 23 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 OCTOBER) 
Date   T index  Conditions    
23 Oct    25    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 35% during local day.
      Enhanced by 35% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Depressed by 30% during local day.
      Depressed by 25% during local night.
   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 (24 OCTOBER - 26 OCTOBER)
Date   T index  Conditions       MUFs                              
24 Oct    30    Normal-fair      Depressed 15%/near predicted 
                                 monthly values
25 Oct    45    Normal-fair      Near predicted monthly values    
26 Oct    50    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) on UT day 23-Oct in 
northern Australia were near predicted monthly values, with 15% 
depressions observed during local day. MUFs in southern Australia 
were depressed by 25-30%. Sporadic E was observed at Townsville. 
Spread F was observed at Hobart, Perth and Canberra during local 
night hours. MUFs are forecast to be near predicted monthly values 
to 15% depressed on 24-Oct. MUFs are expected to be near predicted 
monthly values over 25-26 Oct, with mild depressions possible 
on 25-Oct due to potential geomagnetic activity.

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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