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

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 JUNE) 
Date   T index  Conditions    
25 Jun    71    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 20% during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 30% during local night.
   Southern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values 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
May      94
Jun      109
Jul      107


2. FORECAST (26 JUNE - 28 JUNE)
Date   T index  Conditions       MUFs                              
26 Jun    65    Normal-fair      Near predicted values to 20-30% 
                                 depressed
27 Jun    65    Fair             Near predicted values to 20-30% 
                                 depressed    
28 Jun    65    Fair             Near predicted monthly values 
                                 to 20-30% depressed   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region were near predicted values to 30% depressed. Conditions 
in Darwin were degraded. Spread-F was observed in Hobart. MUFs 
are expected to be depressed during local night hours by 20-30% 
and conditions are expected to be degraded over 26-28 Jun due 
to coronal hole 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