[Ips-dhfpr] ASWFC Daily HF Prop Report - 08 July 23 issued 2331 UT on 08 Jul 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/08 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 JULY) 
Date   T index  Conditions    
08 Jul    85    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 40% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 20% 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
Jun      98
Jul      91
Aug      88


2. FORECAST (09 JULY - 11 JULY)
Date   T index  Conditions       MUFs                              
09 Jul    90    Normal           Near predicted monthly values
10 Jul    90    Normal           Near predicted monthly values    
11 Jul    90    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 62 was issued on 
7 July and is current for 7-9 Jul. Maximum usable frequencies 
(MUFs) on UT day 8-Jul in the Australian region were generally 
near predicted monthly values, with depressions of up to 20% 
during local night in the northern Australian region. Spread 
F was observed during local night hours. Significant sporadic 
E was observed at Brisbane during local night hours. MUFs are 
expected to be near predicted monthly values over 9-11 Jul. Isolated 
minor 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