[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 June 24 issued 2330 UT on 27 Jun 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 JUNE 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 JUNE) 
Date   T index  Conditions    
27 Jun   113    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% 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.
   Antarctic Region (Casey/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
May      121
Jun      116
Jul      117


2. FORECAST (28 JUNE - 30 JUNE)
Date   T index  Conditions       MUFs                              
28 Jun   110    Normal           Near predicted monthly values 
                                 to 15% depressed
29 Jun   105    Normal           Near predicted monthly values 
                                 to 15% depressed    
30 Jun   105    Normal           Near predicted monthly values 
                                 to 15% depressed   

COMMENT: ASWFC SWF HF Communications Warning 70 was issued on 
26 June and is current for 26-28 Jun. Maximum usable frequencies 
(MUFs) on UT day 27-Jun were near predicted values to 15% depressed 
in the Australian region. Spread-F was observed in Brisbane and 
Niue during local night hours. Sporadic-E was observed in Norfolk 
Island during local night hours. Scintillation was observed in 
Niue from 27/0748 UT to 27/0850 UT. MUFs are initially expected 
to be near predicted values on UT day 28-Jun, but may become 
depressed by 15% towards the end of the day and continue over 
29-30 Jun due to multiple CME arrivals.

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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