[Ips-wgr] ASWFC Weekly Geo. Report (15 October 26) issued 0232 UT on 15 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 15 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (06 OCTOBER - 14 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               
 06 Oct   2233 3211    9  
 07 Oct   0110 1221    3  
 08 Oct   1112 2111    4  
 09 Oct   2123 2111    6  
 10 Oct   2222 4665   32  In the BOM magnetometer data for 10 
                          Oct, a moderate (68nT) impulse was 
                          observed at 1513UT.
 11 Oct   3332 3311   11  
 12 Oct   1221 0112    4  
 13 Oct   3223 2221    8  In the BOM magnetometer data for 13 
                          Oct, a weak (13nT) impulse was observed 
                          at 0105UT.
 14 Oct   2222 2222    7  

*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.

G2 geomagnetic conditions were observed in the Australian region on 10-Oct
due to a coronal mass ejection (CME) arrival.

2. FORECAST (15 OCTOBER - 14 NOVEMBER)
Disturbed Periods: 
 21-24 Oct,  31 Oct to 01-Nov, 07-10 Nov.

Best Quiet Periods: 
 15-20 Oct,  25-30 Oct,  3-4 Nov, 11-14 Nov. 

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 15 Oct to 14 Nov.

Central Australian Regions:
 Mildly Disturbed Periods: 31-Oct to 01-Nov, 07 Nov, 09-11 Nov.
 Best Quiet Periods: 15-29 Oct, 03-05 Nov, 13-14 Nov. 

Southern Australian Regions:
 Disturbed Periods: 31-Oct to 01-Nov, 07 Nov, 09-11 Nov.
 Best Quiet Periods: 15-29 Oct, 03-05 Nov, 13-14 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