[Ips-wgr] ASWFC Weekly Geo. Report (25 April 24) issued 0103 UT on 25 Apr 2024 [SEC=OFFICIAL]

[rwc]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 25 APRIL 2024
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (16 APRIL - 24 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               
 16 Apr   3233 3343   15  
 17 Apr   2112 0212    4  
 18 Apr   2110 0001    2  
 19 Apr   2234 4443   19  In the BOM magnetometer data for 19 
                          Apr, a weak (10nT) impulse was observed 
                          at 0559UT.
 20 Apr   2223 2221    7  
 21 Apr   2224 4333   15  
 22 Apr   2221 1022    5  
 23 Apr   2222 2012    5  
 24 Apr   1100 0001    1  

*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.

G0 on all days, however some individual sites recorded some periods of G1 on
19-Apr. 

2. FORECAST (25 APRIL - 25 MAY)
Disturbed Periods: 
26-27 Apr, 2-May, 16-May 

Best Quiet Periods: 
 28-29 Apr,  7-12 May, 19-21 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
Mildly Disturbed Periods: None.
Best Quiet Periods: 28-30 Apr, 4-12 May, 14-15 May, 19-21 May

Central Australian Regions: 
Disturbed Periods: None.
Mildly Disturbed Periods: 26-27 Apr, 2-May, 16-May
Best Quiet Periods: 29-30 Apr, 4-12 May, 14-May, 19-21 May.

Southern Australian Regions:
 Disturbed Periods: 26-28 Apr, 2-3 May, 16-17 May 
 Best Quiet Periods: 29-30 Apr, 7-12 May,  19-21 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.

Australian Space Weather Forecasting Centre
Bureau of Meteorology
ASWFC at bom.gov.au
www.bom.gov.au | www.sws.bom.gov.au