[Ips-dhfpr] SWS Daily HF Prop Report - 31 July 22 issued 2330 UT on 31 Jul 2022 [SEC=OFFICIAL]

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/31 JULY 2022 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (31 JULY) 
Date   T index  Conditions    
31 Jul    39    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 40% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 30% during local night.
      Depressed by 25% after local dawn.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 25% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% 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      60
Jul      65
Aug      67


2. FORECAST (01 AUGUST - 03 AUGUST)
Date   T index  Conditions       MUFs                              
01 Aug    40    Normal-fair      Depressed 15%/near predicted 
                                 monthly values
02 Aug    40    Normal-fair      Depressed 15%/near predicted 
                                 monthly values    
03 Aug    40    Normal-fair      Depressed 15%/near predicted 
                                 monthly values   

COMMENT: Maximum usable frequencies (MUFs) on UT day 31-Jul were 
mostly near predicted monthly values to 15% depressed in the 
Australian region. Ionospheric conditions were degraded during 
local night hours in Northern Australia. The cause of these degraded 
conditions is unknown. Spread-F was observed in most Australian 
sites. MUFs are expected to be near predicted monthly values 
to 15% depressed over 01-03 Aug.

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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
Level 2 Bice Building, Lot Fourteen Precinct, North Terrace, Adelaide SA 5000
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au