[Ips-wgr] SWS Weekly Geo. Report (21 April 22) issued 0121 UT on 21 Apr 2022 [SEC=OFFICIAL]

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 21 APRIL 2022, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (12 APRIL - 20 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               
 12 Apr   2102 3332    8  In the SWS magnetometer data for 12 
                          Apr, a weak (8nT) impulse was observed 
                          at 1124UT.
 13 Apr   2221 1002    4  
 14 Apr   3234 3543   21  
 15 Apr   5443 3322   20  In the SWS magnetometer data for 15 
                          Apr, a weak (9nT) impulse was observed 
                          at 0735UT.
 16 Apr   2211 2211    5  
 17 Apr   1222 2222    6  
 18 Apr   1222 0222    5  
 19 Apr   2322 2001    5  
 20 Apr   2211 0112    4  

*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.

Geomagnetic field for Australian Region:
 14 Apr: G0-G1, with an isolated G2 period
 15 Apr: G0 to G1
 G0 on other days


2. FORECAST (21 APRIL - 21 MAY)
Disturbed Periods: 
 22-23 Apr,  30 Apr to 1 May,  5-8 May,  11-13 May,  20-21 May.

Best Quiet Periods: 
 25-28 Apr,  3 May,  9 May,  15-18 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.

Central Australian Regions
 Disturbed Periods: None.

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 26-27 Apr,  2-4 May,  16-18 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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