[Ips-wgr] IPS Weekly Geo. Report (25 August 11)

rwc rwc at ips.gov.au
Thu Aug 25 12:26:08 EST 2011


SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 25 AUGUST 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (16 AUGUST - 24 AUGUST)
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 Aug   1333 3111    9     
 17 Aug   2221 2011    4     
 18 Aug   1110 1211    3    
 19 Aug   1110 0001    1    
 20 Aug   1211 1122    4    
 21 Aug   1110 1011    2    
 22 Aug   2221 0222    5    
 23 Aug   2122 2332    8    
 24 Aug   2211 2202    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 observed for the last 7 days.
Predominently Quiet conditions with Unsettled to Active
periods expected for the next 7 days. Increased
geomagnetic activity due to recurrent coronal hole expected
between 26Aug-29Aug. 

2. FORECAST (25 AUGUST - 24 SEPTEMBER)
Disturbed Periods: 
Active on 2 Sep.

Best Quiet Periods: 
  25 Aug,  29 Aug to 31 Aug,   3 Sep,  6 Sep to 9 Sep,  13 Sep to 18 Sep.

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

Central Australia Regions: Quiet, Mildly Disturbed 26Aug-29Aug.

Southern Australia Regions: Quiet to Mildy Disturbed, Disturbed 
periods 26Aug-29Aug.



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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