[Ips-dhfpr] ASWFC Daily HF Prop Report - 04 July 23 issued 2330 UT on 04 Jul 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/04 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 JULY) 
Date   T index  Conditions    
04 Jul    96    Normal         

Flares    Max     Fadeout    Freq.  Sectors
 M1/--    1235UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   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 (05 JULY - 07 JULY)
Date   T index  Conditions       MUFs                              
05 Jul    90    Normal           Near predicted monthly values
06 Jul    90    Normal           Near predicted monthly values    
07 Jul    90    Fair             Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 04-Jul in 
the Australian region were generally near predicted monthly values. 
Spread F was occasionally observed during local night hours. 
MUFs are expected to be near predicted monthly values over 05-07 
Jul. Degraded HF conditions may be experienced during local night 
hours on 07-Jul and on 08-Jul due to an anticipated arrival of 
a CME. Mild depressions may be experienced after local dawn on 
08-Jul for southern Australian region if expected geomagnetic 
activity eventuates on 07-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