[Ips-wgr] SWS Weekly Geo. Report (18 October 18) issued 0146 UT on 18 Oct 2018 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 18 OCTOBER 2018, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (09 OCTOBER - 17 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               
 09 Oct   1234 3322   12  
 10 Oct   2123 3332   10  
 11 Oct   2122 3221    7  
 12 Oct   1113 1101    4  In the SWS magnetometer data for 12 
                          Oct, a weak (6nT) impulse was observed 
                          at 1028UT.
 13 Oct   1220 2433   10  
 14 Oct   2112 1212    5  
 15 Oct   2112 3322    8  
 16 Oct   2112 1101    3  
 17 Oct   1120 0001    2  

*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.

2. FORECAST (18 OCTOBER - 17 NOVEMBER)
Disturbed Periods: 
 19-20 Oct,  3-4 Nov, 6 Nov, 9 Nov, 15-16 Nov.

Best Quiet Periods: 
 21-25 Oct,  27 Oct to 2 Nov,  8 Nov,  10-13 Nov.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 18 Oct to 17 Nov.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 19 Oct, 3-5 Nov, 10-12 Nov, 15 Nov.
 Best Quiet Periods: 20 Oct to 2 Nov, 6-9 Nov, 13-14 Nov, 16-17 Nov

Southern Australian Regions:
 Disturbed Periods: 19 Oct, 3-5 Nov, 10-12 Nov, 15 Nov.
 Best Quiet Periods: 20 Oct to 2 Nov, 6-9 Nov, 13-14 Nov, 16-17 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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