[Ips-wgr] ASWFC Weekly Geo. Report (26 February 26) issued 0323 UT on 26 Feb 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 26 FEBRUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (17 FEBRUARY - 25 FEBRUARY)
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               
 17 Feb   2223 3212    8  
 18 Feb   2212 2221    6  
 19 Feb   2221 3211    6  
 20 Feb   1213 3223    9  
 21 Feb   3333 2234   14  
 22 Feb   3445 3433   23  
 23 Feb   3323 3143   14  In the BOM magnetometer data for 23 
                          Feb, a weak (8nT) impulse was observed 
                          at 1336UT.
 24 Feb   2323 3222   10  
 25 Feb   3232 3323   12  

*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.


Active on 22 Feb.   Quiet to unsettled on other days.

2. FORECAST (26 FEBRUARY - 28 MARCH)
Disturbed Periods: 
4-6 Mar,  12 Mar,  14-16 Mar,  22-23 Mar.

Best Quiet Periods: 
 27 Feb,  1-2 Mar,  7-9 Mar.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 26 Feb to 24 Mar.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: None
 Best Quiet Periods: 1-2 Mar, 7-9-Mar. 

Southern Australian Regions:
 Disturbed Periods: 22-23 Mar.
 Best Quiet Periods: 1-2 Mar, 7-9 Mar.


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