[Ips-wgr] SWS Weekly Geo. Report (23 September 21) issued 0138 UT on 23 Sep 2021

[rwc]

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

1. SUMMARY (14 SEPTEMBER - 22 SEPTEMBER)
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 Sep   1112 2221    5  
 15 Sep   1111 0112    3  
 16 Sep   1110 1101    2  
 17 Sep   2213 2343   12  In the SWS magnetometer data for 17 
                          Sep, a weak (8nT) impulse was observed 
                          at 0219UT.
 18 Sep   2323 2001    6  
 19 Sep   1100 1000    1  
 20 Sep   1100 0001    1  
 21 Sep   2120 1423    8  
 22 Sep   3232 1101    6  

*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 SEPTEMBER - 23 OCTOBER)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 23-27 Sep,  30 Sep,  2 Oct,  4-5 Oct,  10 Oct,  14 Oct,  20-23 Oct.

Best Quiet Periods: 
 28-29 Sep,  1 Oct,  3 Oct,  6-9 Oct,  11-13 Oct,  15-19 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods:  28-29 Sep, 1 Oct, 3 Oct, 6-9 Oct, 11-13 Oct, 15-19 Oct.

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods:  28-29 Sep, 1 Oct, 3 Oct, 6-9 Oct, 11-13 Oct, 15-19 Oct.

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods:  28-29 Sep, 1 Oct, 3 Oct, 6-9 Oct, 11-13 Oct, 15-19 Oct.


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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