[Ips-dhfpr] ASWFC Daily HF Prop Report - 07 August 23 issued 2330 UT on 07 Aug 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/07 AUGUST 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (07 AUGUST) 
Date   T index  Conditions    
07 Aug   110    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
  M2.4    0442UT  possible   lower  E. Asia/Aust.
  M1.0    1615UT  possible   lower  South American/
                                    Atlantic
  M1.4    1951UT  possible   lower  East Pacific/
                                    North American
  X1.5    2046UT  probable   all    East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 30% during local day.
      Enhanced by 60% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Southern Australian Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 2340UT 05/08, Ended at 0435UT 06/08

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


2. FORECAST (08 AUGUST - 10 AUGUST)
Date   T index  Conditions       MUFs                              
08 Aug    90    Fair             Near predicted monthly values 
                                 to 15-20% depressed
09 Aug    90    Fair             Near predicted monthly values 
                                 to 15% depressed    
10 Aug    90    Normal-fair      Near predicted monthly values 
                                 to 15% depressed   

COMMENT: ASWFC SWF HF Communications Warning 76 was issued on 
5 August and is current for 6-8 Aug. ASWFC Preliminary HF Communications 
Warning 77 was issued on 7 August and is current for 8-9 Aug. 
Maximum usable frequencies (MUFs) on UT day 07-Aug were near 
predicted values to 15% enhanced in the Australian region. Spread-F 
was observed in Hobart during local night hours. MUFs are expected 
to be near predicted values to 15-20% depressed over 08-10 Aug 
due to anticipated geomagnetic activity. 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