[Ips-dhfpr] ASWFC Daily HF Prop Report - 25 August 23 issued 2330 UT on 25 Aug 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/25 AUGUST 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 AUGUST) 
Date   T index  Conditions    
25 Aug   118    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.4    0109UT  possible   lower  West Pacific

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      No data available during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Enhanced by 105% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jul      103
Aug      88
Sep      84


2. FORECAST (26 AUGUST - 28 AUGUST)
Date   T index  Conditions       MUFs                              
26 Aug   115    Normal           Near to 15% above predicted 
                                 monthly values
27 Aug   105    Normal-fair      Near predicted monthly values    
28 Aug   105    Normal-fair      Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 82 was issued on 
25 August and is current for 25-26 Aug. Maximum usable frequencies 
(MUFs) on UT day 25-Aug were mostly near predicted monthly values 
with 20 % enhanced in the Australian region. Scintillation was 
observed at Niue Island from 25/0728-0859 UT. Due to technical 
issues, analysis of MUFs for local night hours for the Australian, 
Antarctic and Pacific region is restricted. MUFs are expected 
to be near predicted values to 20% enhanced on 26-Aug, and near 
predicted values over 27-28 Aug.

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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