[Ips-dhfpr] ASWFC Daily HF Prop Report - 30 September 23 issued 2331 UT on 30 Sep 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/30 SEPTEMBER 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (30 SEPTEMBER) 
Date   T index  Conditions    
30 Sep   108    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.2    1635UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 50% during local night.
   Niue Island Region:
      Enhanced by 40% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      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 (01 OCTOBER - 03 OCTOBER)
Date   T index  Conditions       MUFs                              
01 Oct   125    Normal           Near to 15% above predicted 
                                 monthly values
02 Oct   125    Normal           Near to 15% above predicted 
                                 monthly values    
03 Oct   120    Normal           Near to 15% above predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) in the Australian 
region on UT day 30-Sep were near predicted monthly values in 
the northern and southern Australian region. Spread-F was observed 
at Hobart during local night hours. MUFs are expected to be near 
predicted monthly values to 15% enhanced over 1-3 Oct. There 
is a slight chance for 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.

----------------------------------------------------------
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