[Ips-dhfpr] ASWFC Daily HF Prop Report - 28 September 23 issued 2331 UT on 28 Sep 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/28 SEPTEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 SEPTEMBER) 
Date   T index  Conditions    
28 Sep   107    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.3    0907UT  possible   lower  Mid East/Indian

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

PCA Event : No event.

Monthly T index:
Month  T index
Aug      115
Sep      96
Oct      93


2. FORECAST (29 SEPTEMBER - 01 OCTOBER)
Date   T index  Conditions       MUFs                              
29 Sep   115    Normal-fair      15 to 20% above predicted monthly 
                                 values
30 Sep   115    Normal-fair      15 to 20% above predicted monthly 
                                 values    
01 Oct   115    Normal           15 to 20% above predicted monthly 
                                 values   

COMMENT: ASWFC SWF HF Communications Warning 102 was issued on 
28 September and is current for 28-29 Sep. Maximum usable frequencies 
(MUFs) in the Australian region on UT day 28-Sep were mostly 
near predicted values to 20% enhanced. Sporadic-E was observed 
at most sites during local night and dawn hours. Some spread-F 
was observed in Hobart during local night hours. MUFs are expected 
to be near predicted monthly values to 20% enhanced over 29-30 
Sep and 01-Oct. 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