[Ips-dhfpr] ASWFC Daily HF Prop Report - 15 October 23 issued 2330 UT on 15 Oct 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/15 OCTOBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 OCTOBER) 
Date   T index  Conditions    
15 Oct   134    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
      Enhanced by 20% after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 50% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 25% after local dawn.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 25% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      104
Oct      98
Nov      96


2. FORECAST (16 OCTOBER - 18 OCTOBER)
Date   T index  Conditions       MUFs                              
16 Oct   135    Normal           Near to 15% above predicted 
                                 monthly values
17 Oct   130    Normal           Near to 15% above predicted 
                                 monthly values    
18 Oct   135    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 15-Oct were 
near predicted monthly values during local day in the Australian 
region. Whilst enhancements of up to 20% were observed in the 
Australian region during local night. Mild Spread F was observed 
at Hobart during local night. MUFs are expected to be near predicted 
monthly values to 15% enhanced over 16-18 Oct. 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