[Ips-dhfpr] ASWFC Daily HF Prop Report - 21 October 22 issued 2330 UT on 21 Oct 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 OCTOBER 2022
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 OCTOBER) 
Date   T index  Conditions    
21 Oct    69    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Sep      74
Oct      69
Nov      69


2. FORECAST (22 OCTOBER - 24 OCTOBER)
Date   T index  Conditions       MUFs                              
22 Oct    75    Normal           Near predicted monthly values
23 Oct    75    Normal           Near predicted monthly values    
24 Oct    65    Normal-fair      Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 21-Oct were 
near predicted monthly values for the northern Australian region. 
Southern Australian region MUFs were mildly depressed during 
the local day. Spread F observed local night hours at Hobart. 
MUFs are expected to be near predicted monthly values over 22-23 
Oct. Degraded conditions are possible for southern Australian 
region 24-25-Oct, if coronal hole wind stream induced geomagnetic 
activity eventuates.

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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