[Ips-wgr] IPS Weekly Geo. Report (23 April 15) issued 0225 UT on 23 Apr 2015

[rwc]

SUBJ: IPS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 23 APRIL 2015, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (14 APRIL - 22 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               
 14 Apr   1121 3333    9  
 15 Apr   2323 4343   16  
 16 Apr   3344 3344   21  
 17 Apr   4333 2222   12  
 18 Apr   2222 2232    8  
 19 Apr   2201 2122    5  
 20 Apr   2211 2123    6  
 21 Apr   3334 4322   16  
 22 Apr   2233 2212    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 International Center for Space Weather 
Science and Education, Japan.


Active on 16 Apr,17 Apr,  21 Apr and 22 Apr. Mostly Quiet to unsettled on other
days.

2. FORECAST (23 APRIL - 23 MAY)
Disturbed Periods: 
23 Apr, 12 May.

Best Quiet Periods: 
 24 Apr, 26 Apr, 28 Apr,  2-5 May, 9-10 May, 16-17 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: NA

Central Australian Regions:
 Disturbed Periods: 30 Apr-2 May, 13-15 May, 18-19 May.
 Best Quiet Periods: 24-29 Apr,  3-12 May, 16-17 May.

Southern Australian Regions:
 Disturbed Periods: 30 Apr-2 May, 13-15 May, 18-19 May.
 Best Quiet Periods: 24-29 Apr,  3-12 May, 16-17 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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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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