[Ips-wgr] ASWFC Weekly Geo. Report (19 February 26) issued 0109 UT on 19 Feb 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 19 FEBRUARY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (10 FEBRUARY - 18 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               
 10 Feb   1112 1123    5  
 11 Feb   3233 2332   12  
 12 Feb   2222 1212    6  
 13 Feb   3222 1323    9  
 14 Feb   2100 0134    6  
 15 Feb   3422 2322   11  
 16 Feb   3232 2342   12  
 17 Feb   2223 3212    8  
 18 Feb   2212 2221    6  

*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 geomagnetic activity was observed in the Australian region
throughout the period of 10-18 Feb. Planetary conditions were
at the G1 level on 15-Feb and at the G2  level on 16-Feb.

2. FORECAST (19 FEBRUARY - 21 MARCH)
Disturbed Periods: 
 22-25 Feb, 12 Mar,  14-17 Mar and 21-Mar.

Best Quiet Periods: 
 27-Feb to 09-Mar, 19-20 Mar.

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

Central Australian Regions: NA
 Mildly Disturbed Periods: 22-25 Feb, 14-17 Mar and 21-Mar.
 Best Quiet Periods: 27-Feb to 12-Mar, 19-20 Mar.

Southern Australian Regions:
 Disturbed Periods: 22-26 Feb, 12 Mar,  14-17 Mar and 21-Mar.
 Best Quiet Periods: 19-20 Feb,  22-23 Feb,  26 Feb to 14 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