[Ips-wsgr] IPS Weekly Solar and Geophysical Report (27 April 07)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 27 APRIL 2007, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (20 APRIL - 26 APRIL)
Date     20    21    22    23    24    25    26
10cm     69    69    69    69    73    77    81
AFr       2     2     8    10     5     4 (  5)
Aaus      4     2    10    10     4     5 (  6)
T        13     9    10    19    15    13    13

Solar:        Solar flare activity
Geomagnetic:  Geomagnetic activity observed for Australian Region.
Frequencies:  Australian Ionospheric F2 critical frequencies

20 Apr 
Solar:        very low
Geomagnetic:  Quiet 

Frequencies:  
near predicted monthly values

21 Apr 
Solar:        very low
Geomagnetic:  Quiet 

Frequencies:  
near predicted monthly values

22 Apr 
Solar:        very low
Geomagnetic:  Quiet to Unsettled with isolated Active periods. 

Frequencies:  
   Equatorial PNG/Niue Region:
      No data available during local day,
      Depressed by 30% during local night.
   Northern Australian Region:
      Depressed by 20% during local day,
      Near predicted monthly values during local night.
   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):
      Enhanced by 15% over the UT day.

23 Apr 
Solar:        very low
Geomagnetic:  Quiet to Active 

Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values over UT day.
   Northern Australian Region:
      Depressed by 15% during local day,
      Enhanced  by 15% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day.
      Enhanced by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

24 Apr 
Solar:        very low
Geomagnetic:  Quiet 

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

25 Apr 
Solar:        low
Geomagnetic:  Quiet 

Frequencies:  
   Equatorial PNG/Niue Region:
      Depressed 10-20% during local day,
      Near predicted monthly values 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 over the UT day.

26 Apr 
Solar:        very low
Geomagnetic:  Quiet 

Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values with periods
      of mild depressions 10-20%.
   Northern Australian Region:
      Near predicted monthly values for the UT day.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

 
2. FORECAST (27 APRIL - 03 MAY)
Solar: 
Low

Geomagnetic:  
active on 29 Apr.
minor storm on 28 Apr.
quiet to unsettled on other days.

Frequencies:  
depressed 10 to 20% on 28 Apr
depressed 20 to 30% on 29 Apr
depressed 20 to 30% on 30 Apr
MUFs near predicted monthly values on other days.

For an explanation of some of the terms in this report, goto
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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