[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 October 23 issued 2330 UT on 28 Oct 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 OCTOBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 OCTOBER) 
Date   T index  Conditions    
28 Oct   133    Normal-fair    

Flares: none.

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

PCA Event : No event.

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


2. FORECAST (29 OCTOBER - 31 OCTOBER)
Date   T index  Conditions       MUFs                              
29 Oct   130    Normal-fair      Near to 15% above predicted 
                                 monthly values
30 Oct   130    Normal-fair      Near to 15% above predicted 
                                 monthly values    
31 Oct   130    Normal-fair      Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the northern Australian 
region on UT day 28-Oct were enhanced by 15-25%, with the strongest 
enhancements occurring during local night. MUFs in the southern 
Australian region were depressed by up to 15% during local day 
and enhanced by up to 15% during local night. Strong spread F 
was observed at Darwin and spread F was observed at Hobart. MUFs 
are expected to be near predicted monthly values to 15% enhanced 
over 29-31 Oct, with the chance of depressions of up to 15% over 
30-31 Oct in the southern Australian region due to possible geomagnetic 
activity.

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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