[Ips-wgr] IPS Weekly Geo. Report (22 March 07)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 22 MARCH 2007, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (13 MARCH - 21 MARCH)
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               
 13 Mar   4343 3333   18     
 14 Mar   2323 3212    9     
 15 Mar   2233 3212    9    
 16 Mar   2211 2123    6    
 17 Mar   2223 2211    7    
 18 Mar   1111 2112    4    
 19 Mar   1111 0001    1    
 20 Mar   1110 2211    3    
 21 Mar   1121 1101    3    

The period started with geomagnetic active at quiet to 
active levels on 13 March due to the effect of a coronal 
hole. The activity then declined and remained at quiet to 
unsettled levels until 17 March. The geomagnetic activity 
then further declined and remained at quiet levels for 
the rest of the period.

2. FORECAST (22 MARCH - 21 APRIL)
Disturbed Periods: 
Mostly unsettled with possibility of isolated active periods on 
23 and 24 March, Active on 09 April. 

Best Quiet Periods: 
26 March,  28 March to 01 April, 04 to 08 April, 11 April, 14 to 17 April.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions: NA

Central Australian Regions:
 Disturbed Periods:  6 Apr.
 Best Quiet Periods: 22 Mar to 3 Apr,  12 Apr to 13 Apr.

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 22 Mar to 23 Mar,  27 Mar to 4 Apr,  9 Apr to 13 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.

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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