[Ips-wgr] IPS Weekly Geo. Report (28 July 11)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 28 JULY 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (19 JULY - 27 JULY)
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               
 19 Jul   1123 2433   11     
 20 Jul   2324 3323   13     
 21 Jul   2231 2222    7    
 22 Jul   2331 2212    8    
 23 Jul   2222 0111    4    
 24 Jul   1111 0221    3    
 25 Jul   2322 3121    8    
 26 Jul   2221 1021    4    
 27 Jul   1110 0012    2    

*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 with isolated active periods
19 and 20 July.

2. FORECAST (28 JULY - 27 AUGUST)
Disturbed Periods: active conditions possible on 30 to 31 Jul,
		   7 Aug, 15 to 16 Aug and 27 Aug.

Best Quiet Periods: 28 to 29 Jul, 2 to 6 Aug, 8 to 13 Aug,
                    18 to 26 Aug.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 28 Jul to 7 Aug, 9 to 16 Aug, 18 to 27 Aug.

Central Australian Regions:
 Mildly disturbed Periods: 8 Aug and 16 to 17 Aug.
 Best Quiet Periods: 28 Jul to 7 Aug, 9 to 15 Aug, 18 to 27 Aug.

Southern Australian Regions:
 Disturbed Periods: 8 Aug and 16 to 17 Aug.
 Best Quiet Periods: 28 Jul to 6 Aug, 9 to 14 Aug, 20 to 27 Aug.

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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