[Ips-wgr] IPS Weekly Geo. Report (24 February 11)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 24 FEBRUARY 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (15 FEBRUARY - 23 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               
 15 Feb   3223 3222   10     
 16 Feb   2121 1001    3     
 17 Feb   2111 1112    4    
 18 Feb   4654 3222   27   
 19 Feb   2122 2212    6    
 20 Feb   2123 3332   10    
 21 Feb   3213 2222    8    
 22 Feb   2211 1111    4    
 23 Feb   1131 1111    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 with active to major storm levels in the first half
of 18 Feb. Weak impulses were observed in the IPS magnetometer data on
18 Feb at 0131 UT (27nT), 0546 UT (22nT) and 0923 UT (14nT).

2. FORECAST (24 FEBRUARY - 26 MARCH)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
  28 Feb to 2 Mar, 13 Mar.

Best Quiet Periods: 
 24 Feb to 27 Feb, 3 Mar to 12 Mar, 14 Mar to 26 Mar.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions: Quiet

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24 Feb to 1 Mar.

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24 Feb to 1 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
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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