[Ips-wgr] IPS Weekly Geo. Report (24 September 09)

rwc rwc at ips.gov.au
Thu Sep 24 11:30:46 EST 2009


SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 24 SEPTEMBER 2009, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (15 SEPTEMBER - 23 SEPTEMBER)
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               
 15 Sep   1321 2212    6     
 16 Sep   2232 1122    7     
 17 Sep   2222 1111    5    
 18 Sep   2211 2111    4    
 19 Sep   1211 1011    3    
 20 Sep   1211 2122    5    
 21 Sep   2233 3111    8    
 22 Sep   2222 2111    5    
 23 Sep   2210 0011    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 observed over the last 7 days.
Unsettled conditions expected 25Sep-27Sep with possible Active 
periods 26Sep due to coronal hole effects. 

2. FORECAST (24 SEPTEMBER - 24 OCTOBER)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 25 Sep to 26 Sep,   14 Oct.

Best Quiet Periods: 
  24 Sep,  27 Sep to 13 Oct,  15 Oct to 20 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24 Sep to 20 Oct.

Central Australian Regions: NA

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24 Sep to 12 Oct,  14 Oct to 20 Oct.

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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