[Ips-wgr] IPS Weekly Geo. Report (16 April 15) issued 0232 UT on 16 Apr 2015

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 16 APRIL 2015, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (07 APRIL - 15 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               
 07 Apr   1100 0001    1  
 08 Apr   1100 0111    1  
 09 Apr   3223 2223   10  In the IPS magnetometer data for 09 
                          Apr, a weak (10nT) impulse was observed 
                          at 0215UT.
 10 Apr   4444 4322   20  In the IPS magnetometer data for 10 
                          Apr, a weak (15nT) impulse was observed 
                          at 1235UT.
 11 Apr   2333 3222   11  
 12 Apr   1110 0111    2  
 13 Apr   2221 1211    5  
 14 Apr   1121 3333    9  
 15 Apr   2323 4343   16  

*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 International Center for Space Weather 
Science and Education, Japan.


Active on 10 and 15 April and quiet to unsettled on other days.

2. FORECAST (16 APRIL - 16 MAY)
Disturbed Periods: 16-18 Apr, 29 Apr - 2 May.

Best Quiet Periods: 20-28 Apr, 3-11 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None expected.
 Best Quiet Periods: 20 Apr - 12 May.

Central Australian Regions:
 Disturbed Periods: 16-18 Apr, 29 Apr - 2 May
 Best Quiet Periods: 20-28 Apr, 3-12 May.

Southern Australian Regions:
 Disturbed Periods: 16 - 20 Apr, 29 Apr - 2 May
 Best Quiet Periods: 21-28 Apr, 3-12 May.


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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