[Ips-wgr] IPS Weekly Geo. Report (21 August 03)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 21 AUGUST 2003, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (12 AUGUST - 20 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               
 12 Aug   4444 4322   20     
 13 Aug   3432 2223   12     
 14 Aug   3332 2333   13    
 15 Aug   2232 2223    9    
 16 Aug   3322 2212    8    
 17 Aug   1111 4345   16    
 18 Aug   4457 5555   54    
 19 Aug   3343 2324   16    
 20 Aug   2332 2333   12    

*estimated from real time data

This week started with 'Quiet to Active' periods due to a 
coronal hole effect, which gradually declined to 'Quiet to 
Unsettled' periods by 16 August. Effect of a CME raised 
the geomagnetic activity to 'Quiet to Active' levels on 
17 August. IMF turned southwards on 18 August and a severe 
geomagnetic storm was observed. The geomagnetic activity 
declined to 'Quiet to Active' level on 19 August and to 'Quiet
to Unsettled' level on 20 August. 

2. FORECAST (21 AUGUST - 20 SEPTEMBER)
Disturbed Periods: 22-30 Aug., 3-11 Sept., 13, 15 Sept., 17-20 Sept.

Best Quiet Periods: 1, 12 Sept.  


PLEASE NOTE:  
At this time of the solar cycle, space weather conditions 
are frequently determined by short timescale events, not 
able to be forecasted a week in advance. 

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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