[Ips-wgr] SWS Weekly Geo. Report (16 December 21) issued 0044 UT on 16 Dec 2021

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 16 DECEMBER 2021, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (07 DECEMBER - 15 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               
 07 Dec   1211 1111    3  
 08 Dec   1111 0101    2  
 09 Dec   1100 1101    1  
 10 Dec   1111 1212    4  
 11 Dec   2320 0002    4  
 12 Dec   1100 0221    2  
 13 Dec   1222 1012    4  
 14 Dec   2211 1211    4  
 15 Dec   1333 2322   10  

*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 observed this week with no significant 
geomagnetic activity.

2. FORECAST (16 DECEMBER - 15 JANUARY)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 16-18 Dec,  28-29 Dec.

Best Quiet Periods: 
 19-26 Dec,  30 Dec to 11 Jan.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
  Disturbed Periods: None

Central Australian Regions: 
  Disturbed periods: 28 Dec
  Best Quiet Periods: 21-25 Dec, 1-7 Jan, 16-20 Jan

Southern Australian Regions:
 Disturbed Periods: 16-17 Dec, 28 Dec
 Best Quiet Periods: 21-25 Dec,  31 Dec to 11 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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