[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 July 26 issued 2330 UT on 11 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 JULY) 
Date   T index  Conditions    
11 Jul    58    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:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% 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
Jun      81
Jul      66
Aug      63


2. FORECAST (12 JULY - 14 JULY)
Date   T index  Conditions       MUFs                              
12 Jul    47    Fair             Depressed 10 to 15%/near predicted 
                                 monthly values
13 Jul    55    Normal-fair      Near predicted monthly values    
14 Jul    57    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) in the Australian 
region were mostly near predicted monthly values during local 
daylight hours over 11-Jul, with depressions of 15-25% observed 
across the Australian region and Niue Island during local night 
hours. Spread-F was also observed during local night hours in 
the Australian region, and sporadic E was reported at Niue Island. 
MUFs are forecast to be up to 10-15% depressed over 12-Jul due 
to forecast geomagnetic activity. MUFs will then improve toward 
predicted values over 13-14 Jul.

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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