[Ips-dhfpr] ASWFC Daily HF Prop Report - 22 June 25 issued 2330 UT on 22 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 JUNE) 
Date   T index  Conditions    
22 Jun    79    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      Depressed by 20% during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values 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 20% over the UT day.

PCA Event : No event.

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


2. FORECAST (23 JUNE - 25 JUNE)
Date   T index  Conditions       MUFs                              
23 Jun    85    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed
24 Jun    85    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed    
25 Jun    85    Normal-fair      Near predicted monthly values 
                                 to 10-20% depressed   

COMMENT: ASWFC HF Communications Warning 67 was issued on 21 
June and is current for 22-24 Jun. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 22-Jun were near predicted 
values to 15% depressed, particularly during local nighttime 
and dawn hours. Mild degradations were observed in the northern 
expected to be near predicted values over 23-25 Jun to 20% depressed 
during local night hours.

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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