[Ips-wgr] ASWFC Weekly Geo. Report (25 June 26) issued 0229 UT on 25 Jun 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 25 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (16 JUNE - 24 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               
 16 Jun   2111 1110    3  
 17 Jun   1222 2100    4  
 18 Jun   2110 0112    3  
 19 Jun   1212 0001    2  
 20 Jun   1111 2011    3  
 21 Jun   1110 0010    1  
 22 Jun   0101 1012    2  
 23 Jun   0001 2120    2  
 24 Jun   2122 3433   12  

*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.


Quiet to unsettled conditions.

2. FORECAST (25 JUNE - 25 JULY)
Disturbed Periods: 
26-28 Jun, 2-3 Jul, 8-9 Jul, 23-24 Jul. 

Best Quiet Periods: 
 29-Jun to 1-Jul, 12-20 Jul

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS

Northern Australian Regions: 
Disturbed Periods: None.
Best Quiet Periods: 29-Jun to 1-Jul, 12-20 Jul


Central Australian Regions: 
Disturbed Periods: None.
Mildly Disturbed Periods: 25-27 Jun, 2-4 Jul, 9-10 Jul, 22-24 Jul
Best Quiet Periods: 29-Jun to 1-Jul, 12-20 Jul


Southern Australian Regions:
 Disturbed Periods: 25-27 Jun, 2-4 Jul, 9-10 Jul, 22-24 Jul.
 Best Quiet Periods: 29-Jun to 1-Jul, 12-20 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