[Ips-wgr] ASWFC Weekly Geo. Report (13 August 26) issued 0259 UT on 13 Aug 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 13 AUGUST 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (04 AUGUST - 12 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               
 04 Aug   2222 0001    3  
 05 Aug   1110 0001    1  
 06 Aug   1100 0000    0  
 07 Aug   0010 1000    0  
 08 Aug   1234 5243   18  
 09 Aug   2221 1011    4  
 10 Aug   1112 0000    2  
 11 Aug   0002 2311    4  In the BOM magnetometer data for 11 
                          Aug, a weak (9nT) impulse was observed 
                          at 1128UT.
 12 Aug   1212 2121    5  

*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 on 8 Aug in the Australian region. G0 on other days.

2. FORECAST (13 AUGUST - 12 SEPTEMBER)
Disturbed Periods: 
18-20 Aug,  4 Sep.

Best Quiet Periods: 
13-16 Aug, 21-Aug to 2-Sep

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
Disturbed Periods: None.
Mildly Disturbed Periods: None.
Best Quiet Periods: 13-16 Aug, 21-28 Aug, 1-2 Sep.

Central Australian Regions: 
Disturbed Periods: None.
Mildly Disturbed Periods: 18-20 Aug, 4-Sep
Best Quiet Periods: 13-16 Aug, 21-Aug to 2-Sep

Southern Australian Regions:
 Disturbed Periods: 18-20 Aug, 4-Sep.
 Best Quiet Periods: 13-16 Aug, 21-Aug to 2-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