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

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (22 SEPTEMBER) 
Date   T index  Conditions    
22 Sep    71    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      66
Sep      62
Oct      60


2. FORECAST (23 SEPTEMBER - 25 SEPTEMBER)
Date   T index  Conditions       MUFs                              
23 Sep    50    Normal-fair      Near predicted monthly values
24 Sep    45    Normal-fair      Near predicted monthly values    
25 Sep    60    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) in the Australian 
region were mostly near predicted monthly values over UT day 
22-Sep, with notable enhancements seen at Niue. Mild spread-F 
was observed at Canberra. MUFs are forecast to be near predicted 
monthly values over 23-25 Sep. While depressions are expected 
due to anticipated geomagnetic activity, current MUFs are already 
mildly elevated above predicted monthly values.

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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