[Ips-wgr] IPS Weekly Geo. Report (22 September 11)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 22 SEPTEMBER 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (13 SEPTEMBER - 21 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               
 13 Sep   3333 2112   10     
 14 Sep   2212 2012    5     
 15 Sep   2211 1212    5    
 16 Sep   2111 0111    3    
 17 Sep   1344 4432   18   
 18 Sep   2212 2212    6    
 19 Sep   1110 0111    2    
 20 Sep   2222 1111    5    
 21 Sep   1112 2212    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.

The field was mostly quiet with unsettled periods on 13 Sep and
unsettled to active periods on 17 Sep. A weak (13nT) impulse was
observed in the IPS magnetometer data at 0344UT on 17 Sep.

2. FORECAST (22 SEPTEMBER - 22 OCTOBER)
Disturbed Periods: active on 23 Sep, 7 Oct and 9 Oct.

Best Quiet Periods: 22 Sep, 26 Sep to 29 Sep, 2 Oct to 6 Oct,
11 Oct to 20 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 22 Sep to 7 Oct, 12 Oct to 22 Oct.

Central Australian Regions:
 Mildly Disturbed Periods: 8 Oct to 11 Oct.
 Best Quiet Periods: 22 Sep to 7 Oct, 12 Oct to 22 Oct.

Southern Australian Regions:
 Disturbed Periods: 8 Oct to 11 Oct.
 Best Quiet Periods: 22 Sep to 7 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
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 

IMPORTANT: This e-mail, including any attachments, may contain,
confidential or copyright information.  The views expressed in 
this message are those of the individual sender, unless 
specifically stated to be the views of IPS.  If you are not 
the intended recipient, please contact the sender immediately 
and delete all copies of this e-mail and attachments. 
To unsubscribe from an IPS mail list either send an email to 
"MAIL_LIST"-leave at ips.gov.au or go to
http://listserver.ips.gov.au/mailman/listinfo/"MAIL_LIST".
Information about training can be obtained from
http://listserver.ips.gov.au/mailman/listinfo/ips-training.
General information is available from
http://listserver.ips.gov.au/mailman/listinfo/ips-info.