[Ips-wgr] ASWFC Weekly Geo. Report (28 August 25) issued 0347 UT on 28 Aug 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 28 AUGUST 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (19 AUGUST - 27 AUGUST)
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               
 19 Aug   2223 3343   13  
 20 Aug   3223 1112    7  
 21 Aug   2211 0231    5  
 22 Aug   3210 1212    5  
 23 Aug   1211 0001    2  
 24 Aug   1210 0111    2  
 25 Aug   0110 3211    4  
 26 Aug   2222 1002    4  
 27 Aug   1111 2212    4  

*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 conditions observed in the Australian region for the whole period
of 19-27 Aug.

2. FORECAST (28 AUGUST - 27 SEPTEMBER)
Disturbed Periods: 
 4-10 Sep, 15-17 Sep.

Best Quiet Periods: 
 28-29 Aug, 31-Aug to 2-Sep, 12-13 Sep and 20-27 Sep.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: NA

Central Australian Regions: 
 Best Quiet Periods: 28-Aug to 7-Sep, 10-15 Sep and 18-27 Sep.

Southern Australian Regions:
 Disturbed Periods: 5-10 Sep, 15-19 Sep.
 Best Quiet Periods: 28-Aug to 3-Sep, 12-13 Sep and 21-27 Sep.


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