[Ips-wgr] ASWFC Weekly Geo. Report (16 April 26) issued 0134 UT on 16 Apr 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 16 APRIL 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (07 APRIL - 15 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               
 07 Apr   2221 1312    6  
 08 Apr   1213 2122    6  
 09 Apr   1111 3222    6  
 10 Apr   3232 4331   13  
 11 Apr   2333 2311   10  
 12 Apr   2222 2111    5  
 13 Apr   1110 0101    1  
 14 Apr   1100 0000    0  
 15 Apr   1100 1111    2  

*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 conditions observed during the week, with only a mild increase in
geomagnetic activity 10-11 Apr.

2. FORECAST (16 APRIL - 16 MAY)
Disturbed Periods: 
 18-20 Apr, 30-Apr to 01-May, 07-May.

Best Quiet Periods: 
 16 Apr,  23-27-Apr,  3-5 May,  10-12 May.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24-27 April, 05-06 May, 10-13 May.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed: 18-21 Apr, 29-Apr to 03-May, 08-09 May. 
 Best Quiet Periods: 23-27 Apr, 05-06 May. 10-13 May.

Southern Australian Regions:
 Disturbed Periods: 18-21 Apr, 29-Apr to 03-May, 08-09 May.
 Best Quiet Periods: 23-27 April, 05-06 May, 10-13 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