[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 October 26 issued 2330 UT on 27 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 OCTOBER) 
Date   T index  Conditions    
27 Oct    30    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.
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values 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      61
Oct      60
Nov      58


2. FORECAST (28 OCTOBER - 30 OCTOBER)
Date   T index  Conditions       MUFs                              
28 Oct    35    Normal-fair      Near predicted monthly values
29 Oct    35    Normal           Near predicted monthly values    
30 Oct    35    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 15%   

COMMENT: Maximum Usable Frequencies (MUFs) in the Australian 
region on 27-Oct were depressed by up to 15% during local daytime 
hours, before returning to near predicted monthly values during 
local night. Sporadic E was observed throughout the northern 
Australian region during local night hours, with mild Spread 
F recorded at Canberra. MUFs are forecast to be near predicted 
monthly values over 28-29 Oct, with some depressions possible 
on 30-Oct due to forecast 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