[Ips-wgr] SWS Weekly Geo. Report (27 December 18) issued 0215 UT on 27 Dec 2018 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 27 DECEMBER 2018, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (18 DECEMBER - 26 DECEMBER)
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               
 18 Dec   2122 2221    6  
 19 Dec   1222 1222    6  
 20 Dec   3231 1221    7  
 21 Dec   1101 1011    2  
 22 Dec   1100 1011    1  
 23 Dec   1000 1011    1  
 24 Dec   1111 1021    3  
 25 Dec   1100 1111    2  
 26 Dec   1111 2111    3  

*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 (27 DECEMBER - 26 JANUARY)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 29 Dec,  6 Jan.

Best Quiet Periods: 
 27-28 Dec,  30 Dec to 5 Jan,  7-22 Jan.

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

Central Australian Regions:
 Moderately Disturbed Periods: 4-7 Jan, 16 Jan
 Best Quiet Periods: 27 Dec to 3 Jan,  8-15 Jan, 17-26 Jan

Southern Australian Regions:
 Disturbed Periods: 4-7 Jan, 16 Jan
 Best Quiet Periods: 27 Dec to 3 Jan,  8-15 Jan, 17-26 Jan


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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