[Ips-dhfpr] ASWFC Daily HF Prop Report - 05 October 23 issued 2331 UT on 05 Oct 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/05 OCTOBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 OCTOBER) 
Date   T index  Conditions    
05 Oct   137    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Enhanced by 25% during local day.
      Enhanced by 15% during local night.
      Enhanced by 40% 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
Sep      104
Oct      98
Nov      96


2. FORECAST (06 OCTOBER - 08 OCTOBER)
Date   T index  Conditions       MUFs                              
06 Oct   135    Normal           Near to 20% above predicted 
                                 monthly values
07 Oct   135    Normal-fair      Near to 20% above predicted 
                                 monthly values    
08 Oct   135    Normal           Near to 20% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 5-Oct were 
15-40% enhanced in the southern Australian region, with enhancements 
of around 25% during local day. MUFs in the northern Australian 
region were near predicted monthly values to 15% enhanced, with 
most enhancements occurring during local night. Spread-F was 
observed at Hobart during local night and sporadic E was observed 
at frequencies below MUF at Cocos Islands during local day. MUFs 
are expected to be near predicted monthly values to 20% enhanced 
over 6-8 Oct, with a slight chance of depressions in the southern 
Australian region over 7-8 Oct due to possible geomagnetic activity 
over 6-7 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