[Ips-wgr] ASWFC Weekly Geo. Report (12 June 25) issued 0148 UT on 12 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 12 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (03 JUNE - 11 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               
 03 Jun   4556 5322   35  
 04 Jun   1333 4432   15  
 05 Jun   2222 2222    7  
 06 Jun   1132 1121    5  
 07 Jun   1233 2144   13  
 08 Jun   2211 2334   10  
 09 Jun   2321 2312    8  
 10 Jun   1121 1222    5  
 11 Jun   2210 1343    9  

*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.


Planetary G3 geomagnetic storm on 3-Jun, G1 on 4, 7 and 11 Jun.
Australian region reached G2 on 3-Jun, then G0 on other days.

2. FORECAST (12 JUNE - 12 JULY)
Disturbed Periods: 
14-15 Jun, 25-26 Jun, 4-Jul, 9-Jul.

Best Quiet Periods: 
 16-24 Jun, 28-Jun to 2-Jul, 5-7 Jul

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 16-24 Jun, 28-Jun to 2-Jul, 5-7 Jul

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 16-24 Jun, 28-Jun to 2-Jul, 5-7 Jul

Southern Australian Regions:
 Disturbed Periods: 14-15 Jun, 25-26 Jun, 4-Jul, 9-Jul.
 Best Quiet Periods: 16-24 Jun, 28-Jun to 2-Jul, 5-7 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