[Ips-dhfpr] ASWFC Daily HF Prop Report - 17 June 23 issued 2330 UT on 17 Jun 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/17 JUNE 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 JUNE) 
Date   T index  Conditions    
17 Jun   102    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Depressed by 20% during local night.
      Enhanced by 25% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
May      98
Jun      88
Jul      87


2. FORECAST (18 JUNE - 20 JUNE)
Date   T index  Conditions       MUFs                              
18 Jun   105    Normal           Near to 15% above predicted 
                                 monthly values
19 Jun   105    Normal           Near to 15% above predicted 
                                 monthly values    
20 Jun   105    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 17-Jun were 
near predicted monthly values to 15% enhanced in northern Australian 
regions. Strong spread F was observed at Hobart during local 
night hours. MUFs are expected to be mostly near predicted values 
to 15% enhanced over 18-20 Jun. Mildly degraded conditions may 
be experienced during local night hours. 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