[Ips-wgr] SWS Weekly Geo. Report (24 December 20) issued 0144 UT on 24 Dec 2020

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 24 DECEMBER 2020, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (15 DECEMBER - 23 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               
 15 Dec   1110 0001    1  
 16 Dec   1200 0101    2  
 17 Dec   0210 0000    1  
 18 Dec   1011 1111    2  
 19 Dec   1122 2022    5  
 20 Dec   2111 1101    3  
 21 Dec   2223 3124   11  In the SWS magnetometer data for 21 
                          Dec, a weak (7nT) impulse was observed 
                          at 1420UT.
 22 Dec   3332 2321   10  
 23 Dec   2223 2112    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 (24 DECEMBER - 23 JANUARY)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 24 Dec, 27 Dec, 6 Jan, 17 Jan to 19 Jan.

Best Quiet Periods: 
 28 Dec to 4 Jan, 8 Jan to 15 Jan.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24 Dec to 23 Jan.

Central Australian Regions:
 Mildly Disturbed Periods: 24 Dec to 25 Dec, 27 Dec.
 Best Quiet Periods: 29 Dec to 16 Jan.

Southern Australian Regions:
 Disturbed Periods: 24 Dec to 25 Dec, 27 Dec.
 Best Quiet Periods: 29 Dec to 16 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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