[Ips-dhfpr] IPS Daily HF Prop Report - 27 January 12 issued 2335 UT on 27 Jan 2012

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 27/2330Z JANUARY 2012 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 JANUARY) 
Date   T index  Conditions    
27 Jan    89    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  X1.8    1837UT  probable   all    East Pacific/
                                    North American

MUFs:
   Cocos Island Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values during the period 12-18UT.
      Proton event in progress, increased absorption observed
      during other times.

PCA Event : Began at 0545UT 23/01, Ended at 1100UT 27/01
 and, 10Mev Proton/PCA Event Began 28 01 2012 0615UT and is in progress

Predicted Monthly T index for January:  76
2. FORECAST (28 JANUARY - 30 JANUARY)
Date   T index  Conditions       MUFs                              
28 Jan    70    Normal-fair      Near predicted monthly values/depressed 
                                 5 to 15%
29 Jan    75    Normal           Near predicted monthly values    
30 Jan    75    Normal           Near predicted monthly values   

COMMENT: MUFs were mostly near predicted monthly values. MUFs 
are expected to be mostly near predicted monthly values for the 
next few days with isolated depressions up to 15% possible at 
times for 28 January. Antarctic region MUFs briefly returned 
to mostly near predicted monthly values during 27 January as 
the Polar Cap Absorption (PCA) event subsided, however, a further 
PCA event is now in progress due to the X1-flare observed at 
1837UT. This PCA event is expected to continue for at least the 
next 24 hours.

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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.

IPS Radio and Space Services        email: asfc at ips.gov.au
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