[Ips-wgr] ASWFC Weekly Geo. Report (26 March 26) issued 0117 UT on 26 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (17 MARCH - 25 MARCH)
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 Mar   2110 0001    2  
 18 Mar   1111 0001    1  
 19 Mar   0110 1000    1  
 20 Mar   2334 3345   21  In the BOM magnetometer data for 20 
                          Mar, a weak (9nT) impulse was observed 
                          at 0226UT, a weak (10nT) impulse was 
                          observed at 0401UT and a weak (9nT) 
                          impulse was observed at 1527UT.
 21 Mar   5554 4222   27  
 22 Mar   3436 5643   38  
 23 Mar   3324 4443   20  
 24 Mar   2334 3222   12  
 25 Mar   2243 1121    9  In the BOM magnetometer data for 25 
                          Mar, a weak (8nT) impulse was observed 
                          at 0631UT.

*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 20-21 Mar,  23 Mar. Minor storm on 22 Mar.  Quiet to unsettled on
other days.

2. FORECAST (26 MARCH - 25 APRIL)
Disturbed Periods: 
3-4 Apr, 8-12 Apr, 16-20 Apr

Best Quiet Periods: 
26-27 Mar, 31-Mar, 1-Apr, 6-7 Apr, 13-15 Apr

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 26-27 Mar, 31-Mar to 2-Apr, 5-8 Apr, 12-15 Apr

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 3-4 Apr, 8-12 Apr, 16-20 Apr
 Best Quiet Periods: 26-27 Mar, 31-Mar to 1-Apr, 6-7 Apr, 13-15 Apr

Southern Australian Regions:
 Disturbed Periods: 3-4 Apr, 8-12 Apr, 16-20 Mar
 Best Quiet Periods: 31-Mar to 1-Apr, 6-7 Apr, 12-15 Apr


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