[Ips-dhfpr] ASWFC Daily HF Prop Report - 23 September 24 issued 2331 UT on 23 Sep 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/23 SEPTEMBER 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (23 SEPTEMBER) 
Date   T index  Conditions    
23 Sep   148    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    1457UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 40% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 30% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Aug      159
Sep      117
Oct      116


2. FORECAST (24 SEPTEMBER - 26 SEPTEMBER)
Date   T index  Conditions       MUFs                              
24 Sep   140    Normal           Near to 15% above predicted 
                                 monthly values
25 Sep   140    Normal-fair      Near to 15% above predicted 
                                 monthly values    
26 Sep   140    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: ASWFC SWF HF Communications Warning 105 was issued on 
22 September and is current for 22-24 Sep. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 23-Sep were near predicted 
monthly values to 15-20% enhanced. Spread F was observed at Hobart 
during local night hours. Ionospheric scintillation was observed 
at Darwin, Niue and Weipa over the interval 23/0748-1540UT. MUFs 
are expected to be near predicted monthly values to 15% enhanced 
over 24-26 Sep. Isolated 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