[Ips-wgr] IPS Weekly Geo. Report (26 April 07)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 26 APRIL 2007, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (17 APRIL - 25 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               
 17 Apr   0222 3232    8     
 18 Apr   2211 1222    5     
 19 Apr   2212 2111    5    
 20 Apr   2211 1111    4    
 21 Apr   1110 0111    2    
 22 Apr   3323 2222   10    
 23 Apr   3442 0101   10    
 24 Apr   2212 1111    4    
 25 Apr   2221 2211    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.


Quiet to unsettled conditions.

2. FORECAST (26 APRIL - 26 MAY)
Disturbed Periods: 
active 28 Apr to 29 Apr, active on 20 May.

Best Quiet Periods: 
 26 Apr to 27 Apr,  2 May to 5 May,  7 May to 8 May,  10 May to 13 May,  16
May to 18 May,  21 May to 22 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions: NA

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 8 May to 19 May.

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods:  26 Apr,  1 May to 5 May,  9 May to 21 May.

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.

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