[Ips-dhfpr] IPS Daily HF Prop Report - 18 August 15 issued 2330 UT on 18 Aug 2015

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 AUGUST 2015 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 AUGUST) 
Date   T index  Conditions    
18 Aug    34    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 50% during local night.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 30% during local night.
      Depressed by 25% after local dawn.
   Northern Australian Region:
      Depressed by 20% during local day.
      Depressed by 45% during local night.
      Depressed by 20% after local dawn.
   Southern Australian Region:
      Depressed by 30% during local day.
      Depressed by 35% during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jul      60
Aug      80
Sep      78


2. FORECAST (19 AUGUST - 21 AUGUST)
Date   T index  Conditions       MUFs                              
19 Aug    35    Normal-fair      15 to 30% below predicted monthly 
                                 values
20 Aug    40    Normal-fair      15 to 30% below predicted monthly 
                                 values    
21 Aug    45    Normal           10 to 20% below predicted monthly 
                                 values   

COMMENT: Conditions for HF radio wave propagation were depressed 
throughout the Australian region during 18 August. Similar HF 
conditions are expected for 19 and 20 Aug. These depressions 
(18 to 20 August) are the after-effects of the geomagnetic storm 
which commenced on 15 August and continuos low levels of ionising 
solar flux. The HF conditions are expected to slowly trend back 
towards mildly depressed conditions relative to the long-term 
monthly prediction of T=80.

----------------------------------------------------------
For an explanation of some of the terms in this report, go to
http://www.ips.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.

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