[Ips-wgr] ASWFC Weekly Geo. Report (24 September 26) issued 0412 UT on 24 Sep 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 24 SEPTEMBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (15 SEPTEMBER - 23 SEPTEMBER)
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               
 15 Sep   3310 2023    7  
 16 Sep   3222 3001    6  
 17 Sep   2122 4212    8  
 18 Sep   1211 0002    2  
 19 Sep   2210 2211    4  
 20 Sep   1120 0001    2  
 21 Sep   1100 0001    1  
 22 Sep   1100 0100    1  
 23 Sep   1100 0012    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 geomagnetic conditions in the Australian region on all days this week.

2. FORECAST (24 SEPTEMBER - 24 OCTOBER)
Disturbed Periods: 
 24 Sep,  13-14 Oct,  22-24 Oct.

Best Quiet Periods: 
 28 Sep to 12 Oct,  15-21 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24 Sep to 24 Oct.

Central Australian Regions:
 Disturbed Periods: 24 Sep,  13-14 Oct,  22-24 Oct.
 Best Quiet Periods: 26 Sep to 12 Oct,  15-21 Oct.

Southern Australian Regions:
 Disturbed Periods: 24 Sep,  13-14 Oct,  22-24 Oct.
 Best Quiet Periods: 28 Sep to 12 Oct,  15-21 Oct.


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