[Ips-wgr] IPS Weekly Geo. Report (29 September 11)

[rwc]

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

1. SUMMARY (20 SEPTEMBER - 28 SEPTEMBER)
K indices are in UT (0-24). For conversion to local time:
AEST = UT + 10 hours; ACST = UT + 9.5 hours; AWST = UT + 8 hours
        Australian Region*              
 Date     K-INDICES    A               
 20 Sep   2222 1111    5     
 21 Sep   1112 2212    5     
 22 Sep   1110 1122    3    
 23 Sep   2110 0002    2    
 24 Sep   2111 2012    4    
 25 Sep   2202 2212    5    
 26 Sep   2112 5564   27    
 27 Sep   4343 3234   18    
 28 Sep   3342 3312   13    

*estimated from real time data

NOTE: Indices may have been generated from data obtained in 
cooperation with the following organisations: Geoscience Australia, 
University of Newcastle Space Physics Group, Australian Government 
Antarctic Division and Space Environment Research Center, Japan.


Active 26 Sep to 27 Sep.
Quiet to unsettled on other days.

2. FORECAST (29 SEPTEMBER - 29 OCTOBER)
Disturbed Periods: 
Active on 7 Oct, Active on 9 Oct.

Best Quiet Periods: 
  30 Sep,  2 Oct to 6 Oct,  11 Oct to 13 Oct,  15 Oct to 23 Oct,   25 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions:
 Disturbed Periods: None.

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 29 Sep to 8 Oct,  10 Oct to 22 Oct.

Southern Australian Regions:
 Disturbed Periods: 8 Oct to 10 Oct,  23 Oct to 25 Oct.
 Best Quiet Periods: 29 Sep to 6 Oct,  12 Oct to 22 Oct.

Pc3 pulsations are high frequency (10-45 second period) variations 
of the Earths magnetic field. Daily pc3-indices are the daily sum of 
20 minute pc3-indices for that station and have been shown to be well 
correlated with rejection of high resolution aeromagnetic survey 
flight-line data.

PLEASE NOTE:
Geomagnetic activity can frequently be determined by short timescale 
solar events that cannot be forecast a week in advance, particularly
at solar maximum.

IPS Radio and Space Services        email: asfc at ips.gov.au
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tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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