[Ips-wsgr] IPS Weekly Solar and Geophysical Report (31 August 07)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 31 AUGUST 2007, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (24 AUGUST - 30 AUGUST)
Date     24    25    26    27    28    29    30
10cm     72    72    70    69    70    70    72
AFr       1     6    10    10     9     4    (5)
Aaus      2     7     9     9    11     5    (7)
T         8    13    15    13     9     2     4

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

24 Aug 
Solar:        Low
Geomagnetic:  Quiet 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day.
      Enhanced by 25% 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):
      Variable enhancements over the UT day.

25 Aug 
Solar:        Very low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   Equatorial PNG/Niue Region:
      Depressed by 15% 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 during local day.
      Enhanced by 40% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Variable enhancements over the UT day.

26 Aug 
Solar:        Very low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   Equatorial PNG/Niue Region:
      Enhanced by 20% during local day.
   Northern Australian Region:
      Near predicted monthly values.
   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):
      Variable enhancements over the UT day.

27 Aug 
Solar:        Very low
Geomagnetic:  Mostly quiet to unsettled with isolated active 
              periods mainly at high latitudes. 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values with depressions to
      40% 14-17 UT.
   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 with depressions to
      25% during night hours.

28 Aug 
Solar:        Very low
Geomagnetic:  Quiet to unsettled with active to minor storm levels 
              observed at some stations 06-15 UT. 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values with depressions to 20%
      at Niue 01-03 UT and depressions up to 50% at Vanimo
      13-20 UT. Night spread F observed at Niue.
   Northern Australian Region:
      Near predicted monthly values. Depressions to 25% at
      Darwin 01-03 UT. Night sporadic E observed at
      Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Spread F observed at
      most stations during the night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 30% depressed. Night
      spread F observed.

29 Aug 
Solar:        Very low
Geomagnetic:  Mostly quiet 
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values with depressions
      to 30% 04-08 UT.
   Northern Australian Region:
      Near predicted monthly values with depressions
      to 25% 01-07 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

30 Aug 
Solar:        Very low
Geomagnetic:  Quiet to unsettled. A weak (15nT) impulse
   was observed in the IPS magnetometer data at 0555UT.
Frequencies:  
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values. Night spread F
      observed.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values. Night spread F
      observed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values. Spread F at night
      observed.

2. FORECAST (31 AUGUST - 06 SEPTEMBER)
Solar: Low

Geomagnetic: Isolated active periods late on 31 Aug, 1 Sep
and possibly 2 Sep. Possibility of isolated minor storming
on 1 Sep. Mostly quiet to unsettled on other days.

Frequencies: Depressions 2 and 3 Sep and possibly 5 and 6 Sep.
Otherwise mostly near predicted monthly values. Spread F may
degrade night communications.

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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