[Ips-wgr] IPS Weekly Geo. Report (18 April 02)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 18 APRIL 2002, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (09 APRIL - 17 APRIL)
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               
 09 Apr   2210 0001    2     
 10 Apr   0221 1211    4     
 11 Apr   3333 2223   12    
 12 Apr   3233 3223   12    
 13 Apr   2323 3223   11    
 14 Apr   3322 4311   11    
 15 Apr   2220 1222    5    
 16 Apr   2231 0023    6    
 17 Apr   2225 5544   27    A moderate (63nT) impulse was observed
in the IPS magnetomter data at 1107UT on 17 Apr.

*estimated from real time data

Two 'halo' CMEs  were observed during this period, one on
15 April and the other one on 17 April. The first CME has 
already affected the geomagnetic activity and raised it
to major storm level on 17April. The second CME is expected
to hit the earth on 19 April (late hours) or 20 April
(early hours). The geomagnetic activity is expected to rise
upto minor storm level on the arrival of this CME.
The >10MeV proton event, that started on 17 April, ended at  
0050 UT on 18 April.

2. FORECAST (18 APRIL - 18 MAY)
Disturbed Periods: 
18-20 April, 26-30 April, 8-11 May
Best Quiet Periods: 
23-25 April, 1-7 May

PEASE 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
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