[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 November 23 issued 2330 UT on 30 Nov 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 NOVEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 NOVEMBER) 
Date   T index  Conditions    
30 Nov   128    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% 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
Oct      130
Nov      100
Dec      98


2. FORECAST (01 DECEMBER - 03 DECEMBER)
Date   T index  Conditions       MUFs                              
01 Dec   110    Normal-fair      Near predicted monthly values 
                                 to 15% enhanced
02 Dec    70    Fair             Depressed 15 to 25%/near predicted 
                                 monthly values    
03 Dec    90    Fair-normal      Depressed 10 to 15%/near predicted 
                                 monthly values   

COMMENT: ASWFC Preliminary HF Communications Warning 122 was 
issued on 29 November and is current for 30 Nov to 1 Dec. Maximum 
usable frequencies (MUFs) were near predicted monthly values 
to 20% enhanced in the Australian region on UT day 30-Nov. MUFs 
are expected to be mostly near predicted monthly values to 15% 
enhanced then becoming depressed 15 to 25% from late in the UT 
day on 01-Dec and on 02-Dec. The anticipated geomagnetic storm 
activity from recent CMEs has yet to eventuate but remains expected 
at reduced strength. Any following ionospheric depression response 
may now be restricted to the southern Australian region.

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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