[Ips-dhfpr] ASWFC Daily HF Prop Report - 11 June 25 issued 2330 UT on 11 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/11 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 JUNE) 
Date   T index  Conditions    
11 Jun    84    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Near predicted monthly values 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 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 (12 JUNE - 14 JUNE)
Date   T index  Conditions       MUFs                              
12 Jun    90    Normal-fair      Depressed 10 to 20%/near predicted 
                                 monthly values
13 Jun    90    Normal           Depressed 10 to 15%/near predicted 
                                 monthly values    
14 Jun   105    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC HF Communications Warning 61 was issued on 10 
June and is current for 10-12 Jun. Maximum usable frequencies 
(MUFs) in the Australian region were near predicted values to 
35% depressed. Spread-F and sporadic-E were prominent during 
local night and dawn hours. Conditions in Hobart, Brisbane and 
Norfolk Island were poor. MUFs are expected to continue to be 
depressed by 10-20% over 12-13 Jun before improving. Spread-F 
is possible 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