[Ips-dhfpr] IPS Daily HF Prop Report - 04 August 11

Regional Warning Centre rwc at ips.gov.au
Fri Aug 5 09:56:29 EST 2011


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 04/2330Z AUGUST 2011 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 AUGUST) 
Date   T index  Conditions    
04 Aug    34    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M9.3    0357UT  probable   lower  E. Asia/Aust.

MUFs:
   Cocos Island Region:
      Depressed by 15% during local day,
      Depressed by 30% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Depressed by 20% during local day,
      Depressed by 25% during local night.
      Depressed by 20% after local dawn.
      SWF's observed 04-05UT Townsville , Darwin, Learmonth.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day,
      Near predicted monthly values during local night.
      SWFs observed 04-05UT Norfolk Is., Brisbane, Sydney, Perth. 
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 20% over the UT day.
      Proton event in progress, increased absorption observed.

PCA Event : 10Mev Proton/PCA Event Began 04 08 2011 0635UT and is in progress

Predicted Monthly T index for August:  59
2. FORECAST (05 AUGUST - 07 AUGUST)
Date   T index  Conditions       MUFs                              
05 Aug    25    Normal-fair      20 to 40% below predicted monthly 
                                 values 
06 Aug    30    Fair             10 to 30% below predicted monthly 
                                 values     
07 Aug    30    Normal-fair      10 to 30% below predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 34 was issued on 3 August 
and is current for interval 4-6 August (SWFs) . Significant MUF 
depressions possible due to geomagnetic disturbance following 
recent solar flare activity. SWF's possible. 
----------------------------------------------------------
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.

IPS Radio and Space Services        email: asfc at ips.gov.au
PO Box 1386                         WWW: http://www.ips.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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