[Ips-dhfpr] SWS Daily HF Prop Report - 21 August 21 issued 2330 UT on 21 Aug 2021

[Regional Warning Centre]

SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 AUGUST 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 AUGUST) 
Date   T index  Conditions    
21 Aug    16    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% 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
Jul      17
Aug      25
Sep      28


2. FORECAST (22 AUGUST - 24 AUGUST)
Date   T index  Conditions       MUFs                              
22 Aug    15    Normal           Near predicted monthly values
23 Aug    20    Normal           Near predicted monthly values    
24 Aug    10    Normal-fair      Near predicted monthly values   

COMMENT: MUFs in the Australian region on UT day 21 August were 
near predicted monthly values, with some mild MUF depressions 
in the Northern Australian region during the local night. There 
were also some moderate MUF depressions in the Cocos Island region 
during the local night. MUFs in the Australian region on UT days 
22-24 August are expected to be mostly near predicted monthly 
values. Some mild MUF depressions may occur on UT day 24 August, 
due to the expected increase in geomagnetic activity.

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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
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