[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 June 25 issued 2330 UT on 30 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 JUNE) 
Date   T index  Conditions    
30 Jun    83    Normal         

Flares: none.

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

PCA Event : No event.

Monthly T index:
Month  T index
May      94
Jun      109
Jul      107


2. FORECAST (01 JULY - 03 JULY)
Date   T index  Conditions       MUFs                              
01 Jul    85    Normal           Near predicted values
02 Jul    80    Normal-fair      Near predicted values to 15% 
                                 depressed    
03 Jul    75    Normal-fair      Near predicted monthly values 
                                 to 15% depressed   

COMMENT: Maximum usable frequencies (MUFs) on UT day 30-Jun in 
the Australian region were near predicted values to 15% depressed. 
Signal spreading was observed in Niue and Hobart during local 
night hours. Sporadic-E was observed in Hobart and Learmonth. 
MUFs are expected to be near predicted values on UT day 1-Jul, 
then becoming 15% depressed over 2-3 Jul due to geomagnetic activity.

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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