[Ips-wgr] SWS Weekly Geo. Report (23 April 20) issued 0130 UT on 23 Apr 2020

[rwc]

SUBJ: SWS WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 23 APRIL 2020, BY Space Weather Services,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (14 APRIL - 22 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               
 14 Apr   2221 0002    3  
 15 Apr   2211 1112    4  
 16 Apr   1110 0110    1  
 17 Apr   1100 1001    1  
 18 Apr   1221 0000    2  
 19 Apr   1100 0000    0  
 20 Apr   2233 5300   13  In the SWS magnetometer data for 20 
                          Apr, a weak (10nT) impulse was observed 
                          at 0232UT.
 21 Apr   2222 3322    9  
 22 Apr   1111 3101    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.


Mostly quiet to unsettled conditions in the Australian region through this
period. Isolated active and minor storm periods observed in this region on UT
day, 20 April.

2. FORECAST (23 APRIL - 23 MAY)
Disturbed Periods: 
No strong recurrent patterns, however minor to mild activity may be experienced
on:
 23 Apr,  26-27 Apr,  29-30 Apr,  5 May,  11 May,  17-18 May.

Best Quiet Periods: 
 24-25 Apr,  28 Apr,  1-4 May,  6-10 May,  12-16 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: Quiet conditions throughout

Central Australian Regions: Quiet conditions throughout

Southern Australian Regions: Quiet conditions throughout


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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