[Ips-wgr] SWS Weekly Geo. Report (23 December 21) issued 0101 UT on 23 Dec 2021

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 23 DECEMBER 2021, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (14 DECEMBER - 22 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               
 14 Dec   2211 1211    4  
 15 Dec   1333 2322   10  
 16 Dec   2232 2122    7  
 17 Dec   2110 1101    2  
 18 Dec   1111 1112    3  
 19 Dec   1101 3445   15  
 20 Dec   4223 2323   12  In the SWS magnetometer data for 20 
                          Dec, a weak (9nT) impulse was observed 
                          at 1434UT.
 21 Dec   3121 3121    7  
 22 Dec   2221 3222    7  

*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 (23 DECEMBER - 22 JANUARY)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 23-25 Dec,  28-29 Dec,  15-17 Jan.

Best Quiet Periods: 
 26-27 Dec,  30 Dec to 14 Jan,  18 Jan.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
Quiet on all days

Central Australian Regions: 
Moderately Disturbed: 11-12 Jan, 16-18 Jan
Quiet on other days


Southern Australian Regions: 
Disturbed: 11-12 Jan, 16-18 Jan
Quiet on other days


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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