[Ips-wgr] IPS Weekly Geo. Report (29 December 11) issued 0214 UT on 29 Dec 2011

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 29 DECEMBER 2011, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (20 DECEMBER - 28 DECEMBER)
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               
 20 Dec   2222 1232    7     
 21 Dec   2112 2223    7     
 22 Dec   2211 1112    4    
 23 Dec   1111 0011    2    
 24 Dec   1121 0112    3    
 25 Dec   1211 0111    3    
 26 Dec   1010 1111    2    
 27 Dec   1110 0011    1    
 28 Dec   1212 3322    8   

*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.
A weak (11nT) impulse was observed in the IPS
magnetometer data at 1115UT on 28 Dec.


2. FORECAST (29 DECEMBER - 28 JANUARY)
Disturbed Periods: 
Active on 29 Dec and 30 Dec.

Best Quiet Periods: 
 2 Jan to 5 Jan and 8 Jan to 28 Jan.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions: 
Disturbed Periods:None

Best Quiet Periods:
 2 Jan to 5 Jan and 9 Jan to 28 Jan.


Central Australian Regions:
Mildly disturbed Periods: 29-30 Dec.
 Best Quiet Periods: 2 Jan to 5 Jan and 9 Jan to 28 Jan.

Southern Australian Regions:
Disturbed Periods: 29-30 Dec.
 Best Quiet Periods: 2 Jan to 5 Jan and 7 Jan to 28 Jan.

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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