[Ips-dhfpr] ASWFC Daily HF Prop Report - 27 September 23 issued 2330 UT on 27 Sep 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/27 SEPTEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 SEPTEMBER) 
Date   T index  Conditions    
27 Sep   113    Fair           

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day.
      Enhanced by 25% during local night.
   Niue Island Region:
      Enhanced by 25% during local day.
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Southern Australian Region:
      Mostly near predicted monthly values.
   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 (28 SEPTEMBER - 30 SEPTEMBER)
Date   T index  Conditions       MUFs                              
28 Sep   115    Normal-fair      10 to 15% above predicted monthly 
                                 values
29 Sep   115    Normal-fair      10 to 15% above predicted monthly 
                                 values    
30 Sep   115    Normal-fair      10 to 15% above predicted monthly 
                                 values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 27-Sep were near predicted values to 15% enhanced. 
Spread-F was observed at Hobart, Canberra and Perth during local 
dawn hours. Sporadic-E was observed at Brisbane and Learmonth 
during local dawn hours. Spread-F may continue at high-to-mid 
latitudes over the next day, but generally HF conditions are 
expected to recover over 28-30 Sep. 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