[Ips-dhfpr] SWS Daily HF Prop Report - 20 May 21 issued 2356 UT on 20 May 2021

rwc rwc at ips.gov.au
Fri May 21 09:56:33 EST 2021


SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 MAY 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 MAY) 
Date   T index  Conditions    
20 May    24    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      No data available.
   Niue Island Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 35% 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
Apr      12
May      21
Jun      24


2. FORECAST (21 MAY - 23 MAY)
Date   T index  Conditions       MUFs                              
21 May     5    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%
22 May     5    Normal-fair      Near predicted monthly values/depressed 
                                 10 to 30%    
23 May    15    Normal-fair      Near predicted monthly values   

COMMENT: MUFs in the Australian region on UT day 20 May were 
near predicted monthly values with some mild depressions in the 
Niue Island region during the local day. There were also some 
moderate enhancements in the Australian region during the local 
night. MUFs are expected to be mostly near predicted monthly 
values with some mild to moderate depressions on UT days 21-22 
May. Then mostly normal HF propagation conditions are expected 
on UT day 23 May.

----------------------------------------------------------
For an explanation of some of the terms in this report, go to
http://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
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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