[Ips-wgr] IPS Weekly Geo. Report (30 June 11)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 30 JUNE 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (21 JUNE - 29 JUNE)
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               
 21 Jun   1221 3222    7     
 22 Jun   2213 2332    9     
 23 Jun   3323 4322   13    
 24 Jun   2223 2223    9    
 25 Jun   2213 1111    5    
 26 Jun   2311 2121    6    
 27 Jun   1111 2002    3    
 28 Jun   1200 1000    1    
 29 Jun   0100 0001    0    

*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 observed over the last week. 
Unsettled conditions with isolated Active periods expected 
01Jul-02Jul due to coronal hole effects. Otherwise mostly 
Quiet for the next 7 days.

2. FORECAST (30 JUNE - 30 JULY)
Disturbed Periods: Active on 20 Jul.

Best Quiet Periods: 30 Jun,   3 Jul,   5 Jul,  11 Jul to 13 Jul, 
15 Jul to 17 Jul,  22 Jul to 26 Jul.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: Quiet

Central Australian Regions: Mildly Disturbed 01Jul-02Jul.

Southern Australian Regions: Disturbed 01Jul-02Jul.


Best Quiet Periods: 4 Jul to 10 Jul,  15 Jul to 18 Jul,  22 Jul to 26 Jul.

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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tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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