[Ips-wgr] ASWFC Weekly Geo. Report (28 May 26) issued 0140 UT on 28 May 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 28 MAY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (19 MAY - 27 MAY)
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               
 19 May   1244 3432   16  
 20 May   2210 0001    2  
 21 May   2220 3121    6  
 22 May   1222 0002    3  
 23 May   0010 0000    0  
 24 May   1110 1021    2  
 25 May   2111 1221    4  
 26 May   1110 0013    3  
 27 May   1221 0212    4  

*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 conditions were observed in the Australian region
this week. 

2. FORECAST (28 MAY - 27 JUNE)
Disturbed Periods: 
 11-12 Jun.

Best Quiet Periods: 
 2-3 Jun,  5-8 Jun,  10 Jun,  17-20 Jun, 25 Jun.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 28 May to 27 Jun.

Central Australian Regions:
 Mildly Disturbed Periods: 4 Jun, 11-15 Jun.
 Best Quiet Periods: 28 May to 2 Jun, 6-9 Jun, 17-27 Jun.

Southern Australian Regions:
 Disturbed Periods: 4 Jun, 11-15 Jun.
 Best Quiet Periods: 28 May to 2 Jun, 6-9 Jun, 17-27 Jun.

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