[Ips-wsgr] IPS Weekly Solar and Geophysical Report (23 September 11)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 23 SEPTEMBER 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (16 SEPTEMBER - 22 SEPTEMBER)
Date     16    17    18    19    20    21    22
10cm    143   145   150   141   144   144   151
AFr       2    14     5     2     6     2 (  3)
Aaus      3    18     6     2     5     5 (  3)
T        65    80    62    69    81    78    82

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

16 Sep 
Solar:        Low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Enhanced by 15% during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Near predicted monthly values.
   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.

17 Sep 
Solar:        Low
Geomagnetic:  Quiet to minor Storm. A weak (13nT) impulse
              was observed in the IPS magnetometer data at
              0344UT on 17 Sep.
Frequencies:  
   Cocos Island Region:
      Enhanced by 20% during local day.
      Depressed by 20% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 25% during local night.
   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.

18 Sep 
Solar:        Low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Mostly 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.

19 Sep 
Solar:        Low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values with enhancements to 23%
      06-08 UT.
   Niue Island Region:
      Near predicted monthly values with enhancements to 35%
      09-12 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 enhancements to 35%
      at times.

20 Sep 
Solar:        Low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values 00-11 and 23 UT. No data
      12-22 UT.
   Niue Island Region:
      Near predicted monthly values with occasional
      enhancements to 30%.
   Northern Australian Region:
      Near predicted monthly values to 25% enhanced.
      Depressions to 40% at Darwin 17-18 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with enhancements to 30%
      mostly Hobart, Perth and Learmonth.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 40% enhanced.

21 Sep 
Solar:        Moderate, with an M1.8 at 1223UT 
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values with occasional
      enhancements to 20%.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with mostly enhanced
      MUFs to 30% after about 15 UT. Night spread F
      observed at Hobart and Perth.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 30% enhanced.

22 Sep 
Solar:        High, with an M1.1 at 1000UT, and an X1.4 at 1101UT
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values with enhancements to 45%
      11-17 UT.
   Niue Island Region:
      Near predicted monthly values with enhancements to 45%
      04-10 and 22-23 UT.
   Northern Australian Region:
      Near predicted monthly values with enhancements to 25%
      11-16 UT at Darwin.
   Southern Australian and New Zealand Region:
      Near predicted monthly values to 20% enhanced. Some night
      spread F observed at Canberra and Hobart. No Learmonth
      data 03-23 UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 25% enhanced.

2. FORECAST (23 SEPTEMBER - 29 SEPTEMBER)
Solar: Moderate with a chance of high solar activity, early in week.

Geomagnetic: Quiet to unsettled with active to minor storm periods
	     likely on 24 and 25 Sep.

Frequencies: Near predicted monthly values to 20% enhanced.
	     Depressions to 20% possible on 25 Sep.

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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