[Ips-wgr] IPS Weekly Geo. Report (26 May 11)

rwc rwc at ips.gov.au
Thu May 26 13:29:42 EST 2011


SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 26 MAY 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (17 MAY - 25 MAY)
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 May   2123 2212    7     
 18 May   1111 1110    2     
 19 May   1111 1000    1    
 20 May   1000 0000    0    
 21 May   0111 0112    2    
 22 May   2110 1100    2    
 23 May   1101 2111    3    
 24 May   1111 2201    3    
 25 May   1110 0001    1    

*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 over the last 7 days.

2. FORECAST (26 MAY - 25 JUNE)
Disturbed Periods: 
Possibly active 27-30 May.

Best Quiet Periods: 
  31 May to 05 Jun,  07 Jun to 10 Jun,  14 Jun to 20 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 26 May to 21 Jun.

Central Australian Regions: 
 Mildly Disturbed Periods: 27-31 May.
 Best Quiet Periods: 01-21 Jun.

Southern Australian Regions:
 Disturbed Periods: 27-31 May.
 Best Quiet Periods: 02 Jun to 08 Jun,   10 Jun,  15 Jun to 21 Jun.

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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