[Ips-wgr] IPS Weekly Geo. Report (25 June 09)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 25 JUNE 2009, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (16 JUNE - 24 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               
 16 Jun   1111 2100    2     
 17 Jun   1111 0001    1     
 18 Jun   1101 0101    1    
 19 Jun   1110 0001    1    
 20 Jun   0221 0111    3    
 21 Jun   2321 2111    6    
 22 Jun   1210 1001    2    
 23 Jun   1112 0102    3    
 24 Jun   3442 1232   13    

*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.


Mostly Quiet conditions observed over the last 7 days with Active 
periods on 24Jun due to the onset of the current hole speed coronal 
hole windstream. Unsettled conditions are expected for 25Jul to 28Jul, 
with possible Active periods between 29Jun to 01Jul. Mostly Quiet to 
Unsettled conditions for 01Jul to 02Jul. 

2. FORECAST (25 JUNE - 25 JULY)
Disturbed Periods: 29Jun to 01Jul.  

Best Quiet Periods: 02Jul to 22Jul.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions: 
 Disturbed Periods: None. 
 Best Quiet Periods: 25Jun to 25Jul.

Central Australian Regions:
 Disturbed Periods: 29Jun to 30Jun. 
 Best Quiet Periods: 25Jun to 28Jun, 01Jul to 22Jul.

Southern Australian Regions:
 Disturbed Periods: 29Jun to 01Jul.
 Best Quiet Periods: 25 Jun to 28Jun, 02Jul to 22Jul.

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
PO Box 1386                         WWW: http://www.ips.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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