[Ips-wgr] ASWFC Weekly Geo. Report (19 March 26) issued 0134 UT on 19 Mar 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

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

1. SUMMARY (10 MARCH - 18 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               
 10 Mar   2222 2321    7  
 11 Mar   2322 2011    6  
 12 Mar   2221 3312    8  
 13 Mar   2234 2323   12  
 14 Mar   4345 5322   24  
 15 Mar   3223 3223   11  
 16 Mar   2222 2211    6  
 17 Mar   2110 0001    2  
 18 Mar   1111 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-Minor geomagnetic storm conditions were observed on 14-Mar
due to a coronal hole wind stream. G0 conditions were observed
on other days.

2. FORECAST (19 MARCH - 18 APRIL)
Disturbed Periods: 
19-22 Mar,  3-4 Apr, 9-11 Apr.

Best Quiet Periods: 
 29 Mar,  31 Mar to 2 Apr,  5 Apr, 7 Apr,  13-15 Apr.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions: 
 Disturbed Periods: 20-21 Mar, 10-Apr.
 Best Quiet Periods: 24-Mar to 8 Apr, 13-14 Apr.

Central Australian Regions:
 Disturbed Periods: 20-22 Mar, 10-Apr.
 Mildly Disturbed: 23-25 Mar, 4-Apr.
 Best Quiet Periods: 26-Mar to 3-Apr, 5-9 Apr, 13-15 Apr.

Southern Australian Regions:
 Disturbed Periods: 19-25 Mar,  4-Apr, 10-11 Apr.
 Best Quiet Periods: 26 Mar to 3 Apr,  5-8 Apr, 13-14 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