[Ips-wgr] IPS Weekly Geo. Report (17 July 08)

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 17 JULY 2008, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (08 JULY - 16 JULY)
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               
 08 Jul   1111 0011    2     
 09 Jul   1111 1011    2     
 10 Jul   1111 1112    3    
 11 Jul   1122 3112    6    
 12 Jul   2344 4221   15    
 13 Jul   2234 2322   11    
 14 Jul   2233 2222    9    
 15 Jul   3223 1111    7    
 16 Jul   1221 1212    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.

Geomagnetic activity remained mostly at quiet levels from 8 to 
10 July, increased upto unsettled levels on 11 July and upto 
active levels from 12 to 14 July due to the effect of a high 
speed solar wind stream from a recurrent coronal hole. With 
the decline of this coronal hole effect, the activity level 
gradually decreased to quiet to unsettled levels on 15 and 
16 July and is expected to further decline during the next 
24 hours. 

2. FORECAST (17 JULY - 16 AUGUST)
Disturbed Periods: 
Active possible on 23 July and 08 August.

Best Quiet Periods: 
 18 Jul to 21 Jul, 25 Jul,  27 Jul to 7 Aug,   11 to 12 Aug and
 14 Aug to 17 Aug. 

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions: NA

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 17 Jul to 7 Aug.

Southern Australian Regions:
 Disturbed Periods: 8 Aug to 10 Aug.
 Best Quiet Periods: 17 Jul to 6 Aug.

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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