[Ips-wgr] IPS Weekly Geo. Report (26 June 03)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 26 JUNE 2003, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (17 JUNE - 25 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               
 17 Jun   4445 4423   25     
 18 Jun   3446 3443   29     
 19 Jun   3333 2223   12    
 20 Jun   2332 2322   10    A weak (13nT) impulse was observed in the IPS
                            magnetomter data at 0838UT on 20 Jun.
 21 Jun   3343 1434   18    
 22 Jun   2233 1343   13    
 23 Jun   3324 2323   13    
 24 Jun   3344 5322   20    
 25 Jun   2333 2443   16    

*estimated from real time data

Disturbances observed at start and end of week
were predominately due to coronal hole high speed 
wind streams.  

NOTE:
A large equatorial coronal hole is currently in the
centre of the solar disk. The Earth is expected to
enter the high speed wind stream from this hole
on 28 Jun. Also, a previously very flare active solar 
region is due back to the solar north-east limb on 27 June.
Solar flare and mass ejection activity is likely to
increase after 28 June.

2. FORECAST (26 JUNE - 26 JULY)
Disturbed Periods: 
Generally elevated background geomagnetic activity due to coronal hole 
high speed wind streams. Isolated CME induced storms possible.
28 - 30 June : active to minor storm.
04 - 07 July : active.
11 - 21 July : active, isolated minor storm periods possible.

Best Quiet Periods: 
02-03 July
08-10 July
23-24 July

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. 

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