[Ips-wgr] ASWFC Weekly Geo. Report (22 October 26) issued 0251 UT on 22 Oct 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 22 OCTOBER 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (13 OCTOBER - 21 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               
 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  
 15 Oct   2113 3222    8  
 16 Oct   2111 2342    9  
 17 Oct   2111 1331    6  
 18 Oct   2211 1210    4  
 19 Oct   1100 0101    1  
 20 Oct   1112 2322    6  
 21 Oct   2222 2333   10  

*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 were observed in the Australian region over 
14-21 Oct. Local G1 conditions were reported at Learmonth and Gingin on 
16-Oct.

2. FORECAST (22 OCTOBER - 21 NOVEMBER)
Disturbed Periods: 
22-Oct, 31-Oct to 02-Nov, 07-09 Nov.

Best Quiet Periods: 
27-29 Oct, 3-6 Nov, 8-Nov, 13-16 Nov, 20-21 Nov.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 23-30 Oct, 02-06 Nov, 11-18 Nov.

Central Australian Regions:
 Mildly Disturbed Periods: 31-Oct to 01-Nov, 07-10 Nov. 
 Best Quiet Periods: 23-30 Oct, 02-06 Nov, 11-18 Nov

Southern Australian Regions:
 Disturbed Periods: 31-Oct to 01-Nov, 07-10 Nov.
 Best Quiet Periods: 23-30 Oct, 02-06 Nov, 11-18 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