[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 October 23 issued 2331 UT on 21 Oct 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 OCTOBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 OCTOBER) 
Date   T index  Conditions    
21 Oct   138    Normal-fair    

Flares: none.

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

PCA Event : No event.

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


2. FORECAST (22 OCTOBER - 24 OCTOBER)
Date   T index  Conditions       MUFs                              
22 Oct   110    Normal-fair      Near predicted monthly values 
                                 to 15% depressed
23 Oct   115    Normal-fair      Near predicted monthly values 
                                 to 15% depressed    
24 Oct   120    Normal           Near predicted monthly values 
                                 to 15% enhanced   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 21-Oct were mostly near predicted monthly values 
to 15% enhanced, particularly during local night hours. Sporadic-E 
was observed in Brisbane, Canberra and Perth during local night 
hours. MUFs are expected to be near monthly predicted values 
over 22-23 Oct, with a chance to be depressed by 15% due to recent 
geomagnetic activity. MUFs are expected to be near predicted 
values to 15% enhanced by 24-Oct.

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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