[Ips-wgr] SWS Weekly Geo. Report (21 February 19) issued 0224 UT on 21 Feb 2019 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 21 FEBRUARY 2019, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (12 FEBRUARY - 20 FEBRUARY)
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 Feb   2111 1002    3  
 13 Feb   1224 3322   11  
 14 Feb   1223 1021    5  
 15 Feb   1101 1100    1  
 16 Feb   0110 1111    2  
 17 Feb   1011 0011    1  
 18 Feb   2211 2101    4  
 19 Feb   1110 0100    1  
 20 Feb   1110 1212    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 (21 FEBRUARY - 23 MARCH)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 21-22 Feb, 27 Feb to 1 Mar, 12 Mar, 20-22 Mar.

Best Quiet Periods: 
 24-26 Feb,  3-11 Mar,  14-18 Mar.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
 Disturbed Periods: None.
 Best Quiet Periods: 21 Feb to 23 Mar.

Central Australian Regions: 
 Disturbed Periods: None
 Mildly Disturbed Periods: 21-22 Feb, 28 Feb to 2 Mar, 13 Mar, 20-21 Mar.
 Best Quiet Periods: 23-27 Feb, 3-12 Mar, 14-18 Mar, 22-23 Mar.

Southern Australian Regions:
 Disturbed Periods: 21-22 Feb, 28 Feb to 2 Mar, 13 Mar, 20-21 Mar.
 Best Quiet Periods: 23-27 Feb, 3-12 Mar, 14-18 Mar, 22-23 Mar.


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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