[Ips-wgr] SWS Weekly Geo. Report (21 September 17) issued 0242 UT on 21 Sep 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 21 SEPTEMBER 2017, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (12 SEPTEMBER - 20 SEPTEMBER)
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               
 12 Sep   2222 3233   10  In the SWS magnetometer data for 12 
                          Sep, a weak (12nT) impulse was observed 
                          at 2005UT.
 13 Sep   4343 2110   12  
 14 Sep   2113 3543   16  In the SWS magnetometer data for 14 
                          Sep, a weak (10nT) impulse was observed 
                          at 1117UT.
 15 Sep   3353 4343   22  
 16 Sep   3433 4322   16  
 17 Sep   2222 4322   10  
 18 Sep   3243 3212   12  
 19 Sep   1112 2221    5  
 20 Sep   2223 3111    7  

*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 15-16 Sep.   Quiet to unsettled on other days.

2. FORECAST (21 SEPTEMBER - 21 OCTOBER)
Disturbed Periods: 
 27-29 Sep,  10-15 Oct.

Best Quiet Periods: 
 21-26 Sep,  5-7 Oct,  18-21 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 21 Sep to 11 Oct,  17-21 Oct.

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 21 Sep to 11 Oct,  17-21 Oct.

Southern Australian Regions:
 Disturbed Periods: 27-29 Sep,  5-6 Oct,  12-16 Oct.
 Best Quiet Periods: 21-26 Sep,  1 Oct,  9-11 Oct,  18-21 Oct.


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.

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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