[Ips-wgr] IPS Weekly Geo. Report (14 April 11)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 14 APRIL 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (05 APRIL - 13 APRIL)
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               
 05 Apr   2211 0022    4     
 06 Apr   3215 4433   19     
 07 Apr   2110 0111    2    
 08 Apr   2122 3223    8    
 09 Apr   2222 2101    5    
 10 Apr   2101 2211    4    
 11 Apr   2122 2322    7    
 12 Apr   2335 4322   17    
 13 Apr   2333 2111    8    

*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.


Conditions were Quite to Unsettled on most days. Minor storm periods
were observed on 06-Apr and 12-Apr due to southward IMF Bz.

2. FORECAST (14 APRIL - 14 MAY)
Disturbed Periods: 
16 Apr, 29 Apr to 30 Apr, 9 May to 10 May

Best Quiet Periods: 
 14 Apr to 15 Apr, 17 Apr to 28 Apr, 1 May to 8 May, 11 May to 14 May

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 14 Apr to 20 Apr.

Central Australian Regions: 
 Disturbed Periods: 16 Apr.
 Best Quiet Periods: 17 Apr to 20 Apr

Southern Australian Regions:
 Disturbed Periods: 16 Apr.
 Best Quiet Periods: 17 Apr to 20 Apr

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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