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

[Regional Warning Centre]

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

1. SUMMARY (27 JULY) 
Date   T index  Conditions    
27 Jul   111    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.9    0951UT  possible   lower  Mid East/Indian
  M1.7    2235UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Enhanced by 20% 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 : No event.

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


2. FORECAST (28 JULY - 30 JULY)
Date   T index  Conditions       MUFs                              
28 Jul   110    Normal           Near predicted monthly values
29 Jul   110    Normal           Near predicted monthly values    
30 Jul   110    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 70 was issued on 
26 July and is current for 26-28 Jul. Maximum usable frequencies 
(MUFs) on UT day 27-Jul were generally near predicted monthly 
values, with enhancements of up to 20% in the northern Australian 
region and up to 15% in the southern Australian region. Spread 
F was observed at Hobart and Canberra during local night hours. 
MUFs are expected to be near predicted monthly values over 28-30 
Jul. Isolated 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