[Ips-wgr] ASWFC Weekly Geo. Report (30 October 25) issued 0109 UT on 30 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 30 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (21 OCTOBER - 29 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               
 21 Oct   2210 0122    4  
 22 Oct   1111 1122    4  
 23 Oct   2100 1122    3  
 24 Oct   2322 2232    9  
 25 Oct   2331 2001    6  
 26 Oct   1122 0111    3  
 27 Oct   1110 1222    4  
 28 Oct   2332 4233   13  
 29 Oct   2222 3333   11  

*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 this week.

2. FORECAST (30 OCTOBER - 29 NOVEMBER)
Disturbed Periods: 
30 Oct, 7-9 Nov, 14-15 Nov, 24-26 Nov.

Best Quiet Periods: 
 2 Nov, 5 Nov, 12 Nov, 18-19 Nov,  22-23 Nov, 29 Nov.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 8 Nov.
 Best Quiet Periods: 1-6 Nov, 10-29 Nov.

Central Australian Regions:
 Disturbed Periods: 8 Nov.
 Mildly Disturbed Periods: 30-Oct, 9-11 Nov, 15-16 Nov, 20 Nov, 26 Nov.
 Best Quiet Periods: 1-6 Nov, 13 Nov, 18 Nov, 22-24 Nov, 28-29 Nov.

Southern Australian Regions:
 Disturbed Periods: 30-Oct, 9-11 Nov, 15-16 Nov, 20 Nov, 26 Nov.
 Best Quiet Periods: 1-6 Nov, 13 Nov, 18 Nov, 22-24 Nov, 28-29 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