[Ips-wgr] ASWFC Weekly Geo. Report (11 June 26) issued 0224 UT on 11 Jun 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 11 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (02 JUNE - 10 JUNE)
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               
 02 Jun   1111 1021    3  
 03 Jun   2212 1122    5  
 04 Jun   2100 1000    1  
 05 Jun   1422 5533   21  In the BOM magnetometer data for 05 
                          Jun, a weak (20nT) impulse was observed 
                          at 0506UT.
 06 Jun   3333 3221   11  
 07 Jun   2122 1211    5  
 08 Jun   2223 2211    7  In the BOM magnetometer data for 08 
                          Jun, a weak (10nT) impulse was observed 
                          at 1135UT.
 09 Jun   1112 2232    6  
 10 Jun   1102 3001    3  

*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 on 5 Jun.   G0 on all other days.

2. FORECAST (11 JUNE - 11 JULY)
Disturbed Periods: 
12-14 Jun.

Best Quiet Periods: 
17-20 Jun, 29-30 Jun, 1-Jul

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 17-Jun to 1-Jul.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 12-14 Jul.
 Best Quiet Periods: 17-Jun 1-Jul.

Southern Australian Regions:
 Disturbed Periods: 12-14 Jul, 2-4 Jul.
 Best Quiet Periods: 17-Jun to 1-Jul. 


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