[Ips-wgr] ASWFC Weekly Geo. Report (27 August 26) issued 0335 UT on 27 Aug 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 27 AUGUST 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (18 AUGUST - 26 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               
 18 Aug   3322 2153   14  
 19 Aug   2434 2122   12  In the BOM magnetometer data for 19 
                          Aug, a weak (8nT) impulse was observed 
                          at 0421UT.
 20 Aug   2221 3122    7  
 21 Aug   2221 1011    4  
 22 Aug   1110 0000    1  
 23 Aug   1221 1001    3  
 24 Aug   1110 0002    2  
 25 Aug   1121 0100    2  
 26 Aug   0110 0001    1  

*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 geomagnetic conditions was observed on 18-Aug. G0 geomagnetic 
conditions was observed on all other days.

2. FORECAST (27 AUGUST - 26 SEPTEMBER)
Disturbed Periods: 
 28 Aug,  13-15 Sep.

Best Quiet Periods: 
 27 Aug,  29 Aug to 12 Sep,  17-26 Sep.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 27 Aug to 26 Sep.

Central Australian Regions:
 Disturbed Periods: 28 Aug,  13-17 Sep.
 Best Quiet Periods: 27 Aug, 30 Aug to 12 Sep,  18-26 Sep.

Southern Australian Regions:
 Disturbed Periods: 28-29 Aug,  13-17 Sep.
 Best Quiet Periods: 27 Aug, 30 Aug to 12 Sep,  18-26 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