[Ips-wgr] SWS Weekly Geo. Report (25 February 21) issued 0059 UT on 25 Feb 2021

rwc rwc at ips.gov.au
Thu Feb 25 11:59:13 EST 2021


SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 25 FEBRUARY 2021, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (16 FEBRUARY - 24 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               
 16 Feb   2323 2311    9  
 17 Feb   2212 2112    5  
 18 Feb   1111 0001    1  
 19 Feb   1113 4343   13  
 20 Feb   3233 3433   15  
 21 Feb   3244 3212   13  
 22 Feb   2223 3232   10  
 23 Feb   2222 3221    7  
 24 Feb   1323 2342   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 with active periods on 19-21 February due 
to coronal hole activity and active periods on 24 February due to CME impact.

2. FORECAST (25 FEBRUARY - 27 MARCH)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 1-2 Mar,  5-6 Mar,  12 Mar,  15 Mar, 18-22 Mar.

Best Quiet Periods: 
 26-28 Feb,  3-4 Mar,  8-11 Mar,  13-14 Mar,  24-27 Mar.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
 Disturbed Periods: None.
 Best Quiet Periods: 25 Feb - 27 Mar.

Central Australian Regions: 
 Mildly Disturbed Periods: 1-2 Mar, 6 Mar, 19-22 Mar.
 Best Quiet Periods: 26-28 Feb, 3-5 Mar, 7-18 Mar,  23-27 Mar.

Southern Australian Regions:
 Disturbed Periods: 1-2 Mar, 6 Mar, 19-22 Mar.
 Best Quiet Periods: 26-28 Feb, 3-5 Mar, 7-18 Mar,  23-27 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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