[Ips-dhfpr] ASWFC Daily HF Prop Report - 13 September 23 issued 2330 UT on 13 Sep 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 SEPTEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 SEPTEMBER) 
Date   T index  Conditions    
13 Sep    86    Fair-poor      

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 40% during local day.
      Enhanced by 30% during local night.
      Enhanced by 25% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day.
      Depressed by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Depressed by 20% during local day.
      Depressed by 25% during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      115
Sep      96
Oct      93


2. FORECAST (14 SEPTEMBER - 16 SEPTEMBER)
Date   T index  Conditions       MUFs                              
14 Sep   100    Normal           Near predicted monthly values
15 Sep   110    Normal           Near predicted monthly values    
16 Sep   110    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 13-Sep were 
depressed by up to 25% in the southern Australian region and 
near predicted monthly values in the northern Australian region. 
Significant spread F was observed at Brisbane, Canberra and Hobart 
and Sporadic E was observed at Hobart, degrading local HF conditions. 
MUFs are generally expected to be near predicted monthly values 
over 14-16 Sep. 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