[Ips-wsgr] IPS Weekly Solar and Geophysical Report (27 May 11)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 27 MAY 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (20 MAY - 26 MAY)
Date     20    21    22    23    24    25    26
10cm     84    84    85    84    82    80    83
AFr       2     4     3     4     5     2 (  5)
Aaus      0     2     2     3     3     1 (  4)
T        35    33    45    35    38    33    33

Solar:        Solar flare activity
Geomagnetic:  Geomagnetic activity observed for Australian region.
Frequencies:  Australian ionospheric F2 critical frequencies

20 May 
Solar:        very low
Geomagnetic:  Quiet 

Frequencies:  
   Cocos Island Region:
      No data available. 
   Niue Island Region:
      Depressed by 10-20% over the UT day. 
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values to 20% depressed. 
   Southern Australian and New Zealand Region:
      Near predicted monthly values to 10% depressed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

21 May 
Solar:        very low
Geomagnetic:  Quiet 

Frequencies:  
   Cocos Island Region:
      No data available. 
   Niue Island Region:
      Near predicted monthly values to 20% depressed 
   Northern Australian Region:
      Depressed by up to 15% during local day,
      Depressed by up to 30% during local night.
   Southern Australian and New Zealand Region:
      Depressed by up to 20% during local day,
      Mostly near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

22 May 
Solar:        very low
Geomagnetic:  Quiet 

Frequencies:  
   Cocos Island Region:
      No data available. 
   Niue Island Region:
      Depressed by up to 30% between 01-13UT,
      Near predicted monthly values at other times.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by up to 30% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by up to 25% around local nightfall, 
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

23 May 
Solar:        very low
Geomagnetic:  Quiet 

Frequencies:  
   Cocos Island Region:
      Depressed by 20% during local day,
      Depressed by 20% during local night.
   Niue Island Region:
      Depressed by 20% 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):
      Near predicted monthly values over the UT day.

24 May 
Solar:        very low
Geomagnetic:  Quiet 

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

25 May 
Solar:        low
Geomagnetic:  Quiet 

Frequencies:  
   Cocos Island Region:
      Depressed by 15% during local day,
      Depressed by 20% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
      Depressed by 25% after local dawn.
   Northern Australian Region:
      Depressed by 20% 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):
      Near predicted monthly values over the UT day.

26 May 
Solar:        very low
Geomagnetic:  Quiet to Unsettled 

Frequencies:  
   Cocos Island Region:
      Depressed by 20% during local day,
      Depressed by 15% during local night.
   Niue Island Region:
      Depressed by 15% during local day,
      Depressed by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 20% 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.

 
2. FORECAST (27 MAY - 02 JUNE)
Solar: 
Low

Geomagnetic:  
Quiet to Unsettled for the forecast period with possible
active periods for 27-30 due to the recurrent coronal
hole effects. 

Frequencies:  
MUFs near predicted monthly values with minor to moderate
depressions at times throughout the forecast period.

For an explanation of some of the terms in this report, go to
http://www.ips.gov.au/1/2/1.

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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