[Ips-wgr] ASWFC Weekly Geo. Report (16 October 25) issued 0209 UT on 16 Oct 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 16 OCTOBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (07 OCTOBER - 15 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               
 07 Oct   2223 3322   10  
 08 Oct   2222 4211    8  In the BOM magnetometer data for 08 
                          Oct, a weak (9nT) impulse was observed 
                          at 1203UT.
 09 Oct   1121 1012    3  In the BOM magnetometer data for 09 
                          Oct, a weak (9nT) impulse was observed 
                          at 0831UT.
 10 Oct   2122 1012    4  
 11 Oct   2332 3323   12  
 12 Oct   3333 3433   16  
 13 Oct   4423 3322   15  
 14 Oct   2121 1212    5  
 15 Oct   2332 2002    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.

G0 geomagnetic conditions were observed in the Australian region over the week.


2. FORECAST (16 OCTOBER - 15 NOVEMBER)
Disturbed Periods: 26-31 Oct, 7-10 Nov.
Best Quiet Periods: 18-25 Oct, 1-6 Nov, 11-15 Nov.


3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Mildly Disturbed Periods: 28-30 Oct, 8 Nov.
 Best Quiet Periods: 16-26 Oct, 01-06 Nov, 10-15 Nov.

Central Australian Regions:
 Disturbed: 28-30 Oct, 8 Nov.
 Mildly Disturbed Periods: 20-21 Oct, 31 Oct, 9-11 Nov.
 Best Quiet Periods: 16-18 Oct, 23-26 Oct, 2-6 Nov, 13-15 Nov.

Southern Australian Regions:
 Disturbed Periods: 20-21 Oct, 28-31 Oct, 8-11 Nov.
 Best Quiet Periods: 16-18 Oct, 23-26 Oct, 2-6 Nov, 13-15 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