[Ips-wsgr] IPS Weekly Solar and Geophysical Report (29 July 11)

rwc rwc at ips.gov.au
Fri Jul 29 12:11:44 EST 2011


SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 29 JULY 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (22 JULY - 28 JULY)
Date     22    23    24    25    26    27    28
10cm     92    88    86    87    94    99   107
AFr      10     6     3    10     5     2 (  4)
Aaus      8     4     3     8     4     2 (  1)
T        53    52    36    41    45    39    39

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

22 Jul 
Solar:        Very low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   Cocos Island Region:
      Enhanced by 20% during local day.
      Near predicted monthly values during local night.
      Depressed by 25% after local dawn.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 30% over the UT day.

23 Jul 
Solar:        Very low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressions to 40% 13-17UT.
   Niue Island Region:
      Mostly near predicted monthly values.
   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):
      Depressed by 30% over the UT day.

24 Jul 
Solar:        Very low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Depressed by 15% during local day.
      Depressed by 40% during local night.
   Niue Island Region:
      Depressed by 20% during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
     Depressed by 30% over the UT day.

25 Jul 
Solar:        Very low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values to 35% enhanced 03-11
      UT. Depressions to 35% at other times.
   Niue Island Region:
      Near predicted monthly values to 25% depressed.
   Northern Australian Region:
      Near predicted monthly values with depressions to 35%
      00, 12-21 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with occasional
      depressions to 20%. Depressions to 35% at Hobart and
      Learmonth 12-20 UT. Night spread F observed at most
      stations.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Weak ionosphere with frequencies near predicted
      monthly values.

26 Jul 
Solar:        Low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values with depressions to 40%
      14-23 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 40%
      08-10 UT and depressions to 25% 11and 20-22 UT.
   Northern Australian Region:
      Mostly depressed to 35% at Darwin. Near predicted
      monthly values with depressions to 25% 10-12, 22-23
      UT at Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with depressions to
      25% mostly around 08-12, 22-23 UT. Night spread F
      observed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Weak ionosphere with MUFs near predicted monthly
      values to 25% depressed.

27 Jul 
Solar:        Moderate, with an M1.1 flare at 1609UT 
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Mostly depressed 10 to 30%.
   Niue Island Region:
      Near predicted monthly values with depressions to
      25% 00-01, 05-09, 11-13 and 20-23 UT.
   Northern Australian Region:
      Mostly 15-35% depressed at Darwin. Near predicted
      monthly values with depressions to 25% 10-12 UT at
      Townsville. Night spread F observed at Townsville
      14-20 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with depressions to 25%
      observed at most stations 06-14 UT. Enhancements to
      35% 16-20 UT. Night spread F observed at Brisbane,
      Hobart and Perth.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Generally weak ionosphere with depressions to 25%
      08-10 UT.

28 Jul 
Solar:        Low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values with depressions to
      35% 11-23 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to
      25% 00-02, 07-09 and 19-23 UT.
   Northern Australian Region:
      Depressed 15-30% 00-18 and 21-22 UT. Near predicted
      monthly values at other times.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with occasional
      depressions to 25% during 03-14 UT. Enhancements
      to 25% observed at Learmonth and Perth 16-21 UT.
      Night spread F observed at Brisbane and Norfolk Is.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with occasional
      depressions to 35% around 10-13 UT. Weak night
      ionosphere.

 
2. FORECAST (29 JULY - 04 AUGUST)
Solar: Low, possible moderate activity.

Geomagnetic: Quiet to unsettled conditions. Active conditions
	     on 31 Jul to 1 Aug.

Frequencies: Near predicted monthly values to 20% depressed.
	     Chance of SWFs (SIDs).

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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