[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 October 26 issued 2330 UT on 22 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 OCTOBER) 
Date   T index  Conditions    
22 Oct    47    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Depressed by 15% during local night.
      Depressed by 25% after local dawn.
   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 (23 OCTOBER - 25 OCTOBER)
Date   T index  Conditions       MUFs                              
23 Oct    40    Normal           Near predicted monthly values
24 Oct    45    Normal           Near predicted monthly values    
25 Oct    45    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) on UT day 22-Oct in 
the northern Australian region were mostly near monthly predicted 
values, with some enhancements observed during the 24-hour period. 
MUFs in the southern Australian region were depressed by 15% 
during local day and night, with depressions reaching 20% during 
local dawn hours. Sporadic E was observed at Learmonth, Perth, 
and Townsville, with Spread F also observed in Perth and Canberra. 
MUFs are forecast to be near predicted monthly values over 23-24 
Oct, with some depressions in the southern Australian region 
possible during 23-Oct. Mild depressions are also 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