[Ips-dhfpr] IPS Daily HF Prop Report - 04 January 10

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 04/2330Z JANUARY 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (04 JANUARY) 
Date   T index  Conditions    
04 Jan    -8    Normal         

Flares: none.

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

PCA Event : No event.

Predicted Monthly T index for January:   3
2. FORECAST (05 JANUARY - 07 JANUARY)
Date   T index  Conditions       MUFs                              
05 Jan   -10    Normal           near predicted monthly values/depressed 
                                 10 to 20% 
06 Jan   -10    Normal           near predicted monthly values/depressed 
                                 10 to 20%     
07 Jan   -10    Normal           near predicted monthly values/depressed 
                                 10 to 20%    
COMMENT: MUFs remain moderately depressed compared with predicted 
monthly values, presumably due to summer seasonal interhemispheric 
(south to north) winds and lack of compensating ionising EUV 
and X-ray flux from solar sunspot groups despite the B and C 
flares from AR 1039. Moderate variability observed over mid-latitudes 
but high variability as usual at northern sub-equatorial latitudes 
from winds and electric fields as geomagnetic activity is low. 
Recurrence, lack of new solar active regions on the visible disc 
suggests continuing MUF depressions of 10 to 20%, mainly at Equatorial/N 
Aus regions. 
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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.

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