[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 July 25 issued 2332 UT on 08 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 JULY) 
Date   T index  Conditions    
08 Jul    79    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M2.4    0418UT  possible   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 40% during local night.
      Depressed by 25% after local dawn.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 35% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jun      79
Jul      104
Aug      102


2. FORECAST (09 JULY - 11 JULY)
Date   T index  Conditions       MUFs                              
09 Jul    80    Normal-fair      Depressed 15 to 20%/near predicted 
                                 monthly values
10 Jul    80    Normal-fair      Depressed 15 to 20%/near predicted 
                                 monthly values    
11 Jul    80    Normal-fair      Depressed 15 to 20%/near predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 8-Jul were depressed 35% to near predicted values, 
with depressed conditions during local night hours for the northern 
Australian region. Spread-F was observed at Townsville, Learmonth, 
Hobart during local night hours. Blanketing sporadic E observed 
at Casey and Mawson in Antarctica. MUFs are expected to be generally 
depressed 15-20% to near predicted values MUFs over 9-11 Jul. 
Isolated minor 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