[Ips-dhfpr] ASWFC Daily HF Prop Report - 20 July 23 issued 0350 UT on 21 Jul 2023 [SEC=OFFICIAL]

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SUBJ: ASWFC DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 JULY 2023
FROM THE AUSTRALIAN SPACE WEATHER FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 JULY) 
Date   T index  Conditions    
20 Jul   105    Normal         

Flares: none.

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

PCA Event : 10MeV Proton/PCA Event Began at 0105UT 18/07, Ended at 0335UT 20/07

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


2. FORECAST (21 JULY - 23 JULY)
Date   T index  Conditions       MUFs                              
21 Jul   100    Normal-fair      Near predicted monthly values
22 Jul    95    Normal           Near predicted monthly values    
23 Jul    95    Normal           Near predicted monthly values   

COMMENT: ASWFC SWF HF Communications Warning 67 was issued on 
19 July and is current for 19-21 Jul. Maximum usable frequencies 
(MUFs) on UT day 20-Jul in the Australian region were generally 
near predicted monthly values to 25% enhanced in northern Australia. 
Spread F was observed during local night hours at Hobart. MUFs 
are expected to be generally near predicted monthly values over 
21-23 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