[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 July 26 issued 2330 UT on 23 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (23 JULY) 
Date   T index  Conditions    
23 Jul    77    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.
   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
Jun      81
Jul      66
Aug      63


2. FORECAST (24 JULY - 26 JULY)
Date   T index  Conditions       MUFs                              
24 Jul    70    Normal-fair      Depressed 15%/near predicted 
                                 monthly values
25 Jul    80    Normal           Near predicted monthly values    
26 Jul    80    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 67 was issued on 
22 July and is current for 23-24 Jul. Maximum Usable Frequencies 
(MUFs) in the Australian region were near predicted values on 
23-Jul. Spread-F was observed at Canberra, Horbart, Perth, Learmonth 
and Norfolk Island during local night hours. MUFs are forecast 
to be near predicted monthly values to 15% depressed over 24 
Jul due to expected geomagnetic activity, before recovering to 
near predicted values on 25-Jul and 26-Jul. Shortwave fadeouts 
are possible.

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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