[Ips-wgr] SWS Weekly Geo. Report (19 August 21) issued 0202 UT on 19 Aug 2021

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 19 AUGUST 2021, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (10 AUGUST - 18 AUGUST)
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               
 10 Aug   2211 2111    4  
 11 Aug   2221 1001    3  
 12 Aug   0110 1112    2  
 13 Aug   1122 0101    3  
 14 Aug   1110 0101    1  
 15 Aug   2233 1122    8  
 16 Aug   2121 2201    4  
 17 Aug   1112 1101    3  
 18 Aug   1211 2110    3  

*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 (19 AUGUST - 18 SEPTEMBER)
Disturbed Periods: 
No strong recurrent patterns, however mild activity may be experienced on:
 20-21 Aug,  24-25 Aug,  29-30 Aug,  3 Sep,  11 Sep,  17-18 Sep

Best Quiet Periods: 
 19 Aug,  22-23 Aug,  26-28 Aug,  31 Aug to 2 Sep,  4-10 Sep,  12-16 Sep

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 19 Aug to 18 Sep.

Central Australian Regions:
 Mildly Disturbed Periods: 25 Aug.
 Best Quiet Periods: 19-24 Aug,  26 Aug to 18 Sep.

Southern Australian Regions:
 Disturbed Periods: 25 Aug.
 Best Quiet Periods: 19-23 Aug,  27 Aug to 18 Sep.


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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