[Ips-dhfpr] ASWFC Daily HF Prop Report - 16 July 23 issued 2330 UT on 16 Jul 2023 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (16 JULY) 
Date   T index  Conditions    
16 Jul   117    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0    0826UT  possible   lower  Mid East/Indian
  M1.7    1508UT  possible   lower  South American/
                                    Atlantic
  M4.0    1748UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 50% during local day.
      Enhanced by 25% during local night.
   Niue Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 35% during local night.
   Southern Australian Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : 10MeV Proton/PCA Event Began at 0625UT 16/07, Ended at 0855UT 16/07

Monthly T index:
Month  T index
Jun      98
Jul      91
Aug      88


2. FORECAST (17 JULY - 19 JULY)
Date   T index  Conditions       MUFs                              
17 Jul   110    Normal-fair      Near to 15% above predicted 
                                 monthly values
18 Jul   100    Normal           Near predicted monthly values    
19 Jul   100    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 16-Jul in 
the Australian region were generally near predicted monthly values 
to 35% enhanced in northern Australian regions. Spread F was 
observed during local night hours across the Australian region 
with stronger occurrences at higher latitudes. MUFs are expected 
to be near predicted monthly values over 17-19 Jul, with enhancements 
of 15% on 17-Jul. 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