[Ips-wgr] IPS Weekly Geo. Report (26 February 09)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 26 FEBRUARY 2009, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (17 FEBRUARY - 25 FEBRUARY)
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               
 17 Feb   1211 1111    3     
 18 Feb   1211 0112    3     
 19 Feb   1111 1212    4    
 20 Feb   2221 1222    6    
 21 Feb   1112 1112    4    
 22 Feb   2222 2112    6    
 23 Feb   2222 2322    8    
 24 Feb   2222 1112    5    
 25 Feb   1212 1012    4    

*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.


Quiet to unsettled conditions.

2. FORECAST (26 FEBRUARY - 28 MARCH)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
  27 Feb, 03 Mar, 13-14 Mar.

Best Quiet Periods: 
  26 Feb,  28 Feb to 02 Mar, 06 Mar to 12 Mar,  15 Mar to 24 Mar.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions:
 Disturbed periods: No significant disturbances
 Best Quiet Periods: 26 Feb to 21 Mar

Central Australian Regions: 
 Disturbed Periods: Mild disturbance 13 Mar to 14 Mar.
 Best Quiet Periods: 26 Feb to 12 Mar, 15 Mar to 21 Mar.

Southern Australian Regions:
 Disturbed Periods: 27 Feb to 28 Feb, 13 Mar to 15 Mar. 
 Best Quiet Periods: 01 Mar to 12 Mar, 16 Mar to 21 Mar.

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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