[Ips-wgr] ASWFC Weekly Geo. Report (27 November 25) issued 0156 UT on 27 Nov 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 27 NOVEMBER 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (18 NOVEMBER - 26 NOVEMBER)
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               
 18 Nov   2210 0001    2  
 19 Nov   1010 1121    2  
 20 Nov   1211 1223    6  
 21 Nov   2311 1232    7  
 22 Nov   2111 2122    5  
 23 Nov   2132 2322    8  
 24 Nov   2333 4433   17  
 25 Nov   3335 4433   22  
 26 Nov   3333 5322   17  

*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 conditions were observed in the Australian region on 25-26 Nov, 
G0 otherwise.

2. FORECAST (27 NOVEMBER - 27 DECEMBER)
Disturbed Periods: 
27 Nov,  2-5 Dec,  21-23 Dec.

Best Quiet Periods: 
8-17 Dec,  19-20 Dec.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: 9 Dec.
 Best Quiet Periods: 27 Nov to 8 Dec,  10-21 Dec.

Central Australian Regions:
 Disturbed Periods: 9 Dec.
 Best Quiet Periods: 27 Nov to 8 Dec,  11-21 Dec.

Southern Australian Regions:
 Disturbed Periods: 4 Dec,  9-10 Dec,  23 Dec.
 Best Quiet Periods: 28 Nov to 2 Dec,  8 Dec,  11-12 Dec,  14-20 Dec.


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