[Ips-dhfpr] ASWFC Daily HF Prop Report - 20 July 24 issued 2330 UT on 20 Jul 2024 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 JULY 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 JULY) 
Date   T index  Conditions    
20 Jul   128    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.0 19/2252UT  possible   lower  East Pacific/
                                    North American
  M1.8    0720UT  possible   lower  Mid East/Indian
  M1.5    1849UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 50% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Davis/Mawson):
      Enhanced by 30% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jun      120
Jul      118
Aug      117


2. FORECAST (21 JULY - 23 JULY)
Date   T index  Conditions       MUFs                              
21 Jul   135    Normal           Near predicted monthly values 
                                 to 10-15% enhanced
22 Jul   135    Normal           Near predicted monthly values 
                                 to 10-15% enhanced    
23 Jul   135    Normal           Near predicted monthly values 
                                 to 10-15% enhanced   

COMMENT: ASWFC SWF HF Communications Warning 76 was issued on 
19 July and is current for 20-22 Jul. Maximum usable frequencies 
(MUFs) in the Australian region were mostly near predicted vales 
to 20% enhanced. Spread-F was observed in Hobart. Scintillation 
was observed from 20/0657-0959 UT in Niue. MUFs are expected 
to be near predicted values over 21-23 Jul. Enhancements up to 
10-15% 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