[Ips-wgr] ASWFC Weekly Geo. Report (08 October 26) issued 0110 UT on 08 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 08 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (29 SEPTEMBER - 07 OCTOBER)
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               
 29 Sep   1100 0001    1  
 30 Sep   1101 1000    1  
 01 Oct   1110 0112    2  
 02 Oct   1100 0002    1  
 03 Oct   2222 1101    4  
 04 Oct   3345 3343   22  
 05 Oct   3423 3223   13  In the BOM magnetometer data for 05 
                          Oct, a weak (11nT) impulse was observed 
                          at 1356UT.
 06 Oct   2233 3211    9  
 07 Oct   0110 1221    3  

*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.


G1 in the Australian region on 4-Oct. G0 on all other days. 

2. FORECAST (08 OCTOBER - 07 NOVEMBER)
Disturbed Periods: 
9-11 Oct, 21-22 Oct, 31-Oct to 1-Nov

Best Quiet Periods: 
 13-19 Oct, 25-30 Oct, 4-5 Nov. 

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
Disturbed periods: None.
Best quiet periods: 13-19 Oct, 25-30 Oct, 4-5 Nov.

Central Australian Regions: 
Disturbed periods: None.
Mildly disturbed periods: 9-11 Oct, 21-22 Oct, 31-Oct to 1-Nov.
Best quiet periods: 13-19 Oct, 25-30 Oct, 4-5 Nov. 

Southern Australian Regions: 
Disturbed periods: 9-11 Oct, 21-22 Oct, 31-Oct to 1-Nov.
Best quiet periods: 13-19 Oct, 25-30 Oct, 4-5 Nov. 


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