[Ips-dhfpr] IPS Daily HF Prop Report - 07 June 10

rwc rwc at ips.gov.au
Tue Jun 8 09:15:39 EST 2010


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 07/2330Z JUNE 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (07 JUNE) 
Date   T index  Conditions    
07 Jun    14    Normal         

Flares: none.

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

PCA Event : No event.

Predicted Monthly T index for June:  26
2. FORECAST (08 JUNE - 10 JUNE)
Date   T index  Conditions       MUFs                              
08 Jun     5    Normal           5 to 20% below predicted monthly 
                                 values 
09 Jun    14    Normal           near predicted monthly values/depressed 
                                 0 to 10%     
10 Jun    14    Normal           Near predicted monthly values    
COMMENT: IMF Bz north-south was mildly inducive for merging with 
the geomagnetic field, causing Unsettled geomagnetic conditions, 
depressing frequencies at near equatorial and polar latitudes, 
and not counterbalanced by EUV ionisation as the sunspot groups 
decline. Solar wind speed is expected to rise on the 8th due 
to a recurrent coronal hole, causing Unsettled geomagnetic conditions, 
which should slightly depress HF frequencies. This hole is thin 
in solar longitude however, so effects should only last for a 
day or two. Spread F is prevalent at several stations, particularly 
at night, possibly due to Unsettled geomagnetic activity and 
so likely to continue for a day or two. 
----------------------------------------------------------
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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