[Ips-wgr] ASWFC Weekly Geo. Report (01 October 26) issued 0448 UT on 01 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 01 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (22 SEPTEMBER - 30 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               
 22 Sep   1100 0100    1  
 23 Sep   1100 0012    2  
 24 Sep   2234 3322   12  
 25 Sep   2233 4223   12  
 26 Sep   2323 1122    8  
 27 Sep   2121 2001    3  
 28 Sep   1000 1100    1  
 29 Sep   1100 0001    1  
 30 Sep   1101 1000    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.


Quiet to unsettled conditions.

2. FORECAST (01 OCTOBER - 31 OCTOBER)
Disturbed Periods: 
2 Oct,  22 Oct.

Best Quiet Periods: 
 9-10 Oct,  15-20 Oct,  25-30 Oct.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 01-31 Oct.

Central Australian Regions:
 Disturbed Periods: 13-14 Oct,  22-24 Oct, 31 Oct.
 Best Quiet Periods: 01-12 Oct,  15-21 Oct, 25-30 Oct.

Southern Australian Regions:
 Disturbed Periods: 13-14 Oct,  22-24 Oct, 31 Oct.
 Best Quiet Periods: 01-12 Oct,  15-21 Oct, 25-30 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