[Ips-wgr] SWS Weekly Geo. Report (15 April 21) issued 0302 UT on 15 Apr 2021

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 15 APRIL 2021, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (06 APRIL - 14 APRIL)
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               
 06 Apr   1110 1101    2  
 07 Apr   1223 4431   13  
 08 Apr   1101 1000    1  
 09 Apr   1101 0200    2  
 10 Apr   0001 0202    2  
 11 Apr   1211 0111    3  
 12 Apr   1111 1310    4  
 13 Apr   1112 1112    4  
 14 Apr   1212 2122    5  

*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 (15 APRIL - 15 MAY)
Disturbed Periods: 
16-18 Apr, 21-22 Apr, 4 May

Best Quiet Periods: 
 15 Apr,  24 Apr to 3 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 21-28 Apr, 02-06 May.

Central Australian Regions: NA
 Mildly Disturbed Periods: 16-18 April
 Best Quiet Periods: 21-28 Apr, 02-06 May.

Southern Australian Regions:
 Disturbed Periods: 16-18 April
  Best Quiet Periods: 21-28 Apr, 02-06 May.

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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