[Ips-dhfpr] SWS Daily HF Prop Report - 22 July 22 issued 2330 UT on 22 Jul 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/22 JULY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 JULY) 
Date   T index  Conditions    
22 Jul    77    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Enhanced by 35% during local day.
      Depressed by 25% during local night.
      Depressed by 35% after local dawn.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Depressed by 20% 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 : No event.

Monthly T index:
Month  T index
Jun      60
Jul      65
Aug      67


2. FORECAST (23 JULY - 25 JULY)
Date   T index  Conditions       MUFs                              
23 Jul    65    Fair             Near predicted monthly values
24 Jul    65    Normal           Near predicted monthly values    
25 Jul    65    Normal           Near predicted monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 22-Jul were 
near monthly predicted values. Spread-F was observed across the 
Australian region during local night hours. Significantly enhanced 
HF conditions were observed at Cocos Islands over local day. 
Periods of sporadic E were observed at Hobart, Learmonth, Norfolk, 
and Townsville. MUFs are generally expected to be near monthly 
predicted values over 23-25 Jul, with mild degradations possible 
over 23-24 Jul due to the combined effects of a coronal hole 
high speed wind stream and an impact from a CME first observed 
on 21-Jul.

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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.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
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