[Ips-wgr] SWS Weekly Geo. Report (26 October 17) issued 0220 UT on 26 Oct 2017 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 26 OCTOBER 2017, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (17 OCTOBER - 25 OCTOBER)
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               
 17 Oct   2113 2111    5  
 18 Oct   1102 1011    2  
 19 Oct   1223 3422   11  
 20 Oct   2121 2012    4  
 21 Oct   1122 3222    7  In the SWS magnetometer data for 21 
                          Oct, a weak (8nT) impulse was observed 
                          at 0611UT.
 22 Oct   2111 1112    4  
 23 Oct   2212 2101    4  
 24 Oct   1133 4423   14  
 25 Oct   3343 2222   12  

*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.


Quiet to Unsettled conditions during the previous week. Unsettled
to Active periods expected for the first half of the forecast week 
due to recurrent coronal hole effects.

2. FORECAST (26 OCTOBER - 25 NOVEMBER)
Disturbed Periods: 
26 Oct-27 Oct,  8-12 Nov,  20-23 Nov.

Best Quiet Periods: 
 30 Oct to 6 Nov,  13-14 Nov,  17-19 Nov.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 26 Oct to 20 Nov.

Central Australian Regions:
 Mildly Disturbed Periods: 26 Oct-27 Oct, 08 Nov-12 Nov.
 Best Quiet Periods: 29 Oct to 07 Nov, 13-14 Nov,  17-19 Nov.

Southern Australian Regions:
 Disturbed Periods: 26 Oct- 27 Oct,  8-12 Nov.
 Best Quiet Periods: 29 Oct to 07 Nov,  13-14 Nov,  17-19 Nov.


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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