[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 July 26 issued 2340 UT on 22 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (22 JULY) 
Date   T index  Conditions    
22 Jul    87    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M3.6    0635UT  possible   lower  Mid East/Indian

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.
      Near predicted monthly values during local night.
      Enhanced by 55% after local dawn.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced 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 (23 JULY - 25 JULY)
Date   T index  Conditions       MUFs                              
23 Jul    60    Normal           Depressed 15%/near predicted 
                                 monthly values
24 Jul    75    Normal           Near predicted monthly values    
25 Jul    80    Normal           Near predicted monthly values   

COMMENT: Maximum Usable Frequencies (MUFs) in the Australian 
region were near predicted values on 22-Jul, with some enhancements 
of up to 15% observed in the Australian region. Sporadic E was 
observed at Learmonth and Spread-F was observed at Perth, Hobart 
and Canberra during local night hours. MUFs are forecast to become 
depressed by up to 15% over 23 Jul due to expected geomagnetic 
activity over this period, before recovering to near predicted 
values on 24-Jul and 25-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