[Ips-dhfpr] ASWFC Daily HF Prop Report - 31 October 23 issued 2330 UT on 31 Oct 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/31 OCTOBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (31 OCTOBER) 
Date   T index  Conditions    
31 Oct   135    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Enhanced by 75% during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 30% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Near predicted monthly values 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 (01 NOVEMBER - 03 NOVEMBER)
Date   T index  Conditions       MUFs                              
01 Nov   130    Normal           Near to 15% above predicted 
                                 monthly values
02 Nov   130    Normal           Near to 15% above predicted 
                                 monthly values    
03 Nov   120    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 107 was issued on 
31 October and is current for 31 Oct to 1 Nov. Maximum usable 
frequencies (MUFs) were mostly near predicted monthly values 
to 15% enhanced in the Australian region. Sporadic-E was observed 
at low latitude sites such as Darwin, Norfolk Island and Niue 
Island at local dusk hours. MUFs are expected to be mostly near 
predicted values to 15% enhanced over 01-03 Nov. 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