[Ips-dhfpr] ASWFC Daily HF Prop Report - 01 October 23 issued 2330 UT on 01 Oct 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/01 OCTOBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (01 OCTOBER) 
Date   T index  Conditions    
01 Oct   109    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M2.5    0132UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 60% during local night.
   Niue Island Region:
      Enhanced by 50% during local day.
      Enhanced by 45% during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Depressed by 15% during local day.
      Near predicted monthly values 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      93
Nov      91


2. FORECAST (02 OCTOBER - 04 OCTOBER)
Date   T index  Conditions       MUFs                              
02 Oct   110    Normal           Near to 15% above predicted 
                                 monthly values
03 Oct   110    Normal           Near to 15% above predicted 
                                 monthly values    
04 Oct   120    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 1-Oct were 15% enhanced in the northern Australian 
region. MUFs were near predicted monthly values to 15% depressed 
in the southern Australian region, with most depressions occurring 
during local day. Spread-F was observed at Hobart, Canberra and 
Perth during local night hours. MUFs are expected to be near 
predicted monthly values to 15% enhanced over 2-4 Oct. There 
is a chance for further minor depressions in the southern Australian 
region on 2-3 Oct due to coronal hole high speed wind stream 
effects. 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