[Ips-wgr] IPS Weekly Geo. Report (15 September 11)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 15 SEPTEMBER 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (06 SEPTEMBER - 14 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               
 06 Sep   2232 2112    7     
 07 Sep   2212 2112    5     
 08 Sep   1221 0012    3    
 09 Sep   1211 5453   19    A weak (33nT) impulse was observed in the IPS
magnetometer data at 1243UT on 09 Sep.
 10 Sep   4344 2333   18    
 11 Sep   2211 3212    6    
 12 Sep   3334 3343   18    
 13 Sep   3333 2112   10    
 14 Sep   2212 2012    5    

*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.


Mostly quiet to unsettled conditions.
Active periods observed on 10 and 12 September.
Minor storm periods observed on 09 September.

2. FORECAST (15 SEPTEMBER - 15 OCTOBER)
Disturbed Periods: 
9-10 Oct.

Best Quiet Periods: 
 15-17 Sep, 20-24 Sep, 26-29 Sep, 2-5 Oct and 12-14 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods:
 20-24 Sep, 26-29 Sep, 2-5 Oct and 12-14 Oct 

Central Australian Regions:
 Disturbed Periods: None.

Southern Australian Regions:
 Disturbed Periods: 9-10 Oct.
 Best Quiet Periods:20-24 Sep, 26-29 Sep,
 2-5 Oct and 12-14 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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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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