[Ips-wgr] ASWFC Weekly Geo. Report (05 June 25) issued 0118 UT on 05 Jun 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 05 JUNE 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (27 MAY - 04 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               
 27 May   2212 2233    8  
 28 May   3323 1332   11  
 29 May   5354 4544   33  
 30 May   4343 4433   21  
 31 May   2222 3223    9  
 01 Jun   3556 5442   37  In the BOM magnetometer data for 01 
                          Jun, a weak (41nT) impulse was observed 
                          at 0543UT.
 02 Jun   4446 5454   38  In the BOM magnetometer data for 02 
                          Jun, a weak (12nT) impulse was observed 
                          at 0716UT.
 03 Jun   4556 5322   35  
 04 Jun   1333 4432   15  

*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.

Geomagnetic conditions at the G2 level in the Australian region
were observed on 01-03 Jun. G1 level conditions were observed on
29-May. 

Geomagnetic conditions at the G4 level in the planetary region
were observed on 01-Jun. G3 conditions were observed on 29-May
and 02-03 Jun. G1 conditions were observed on 30-May and 04-Jun.

2. FORECAST (05 JUNE - 05 JULY)
Disturbed Periods: 
 4-5 Jun,  12-27 Jun and 02-04 Jul

Best Quiet Periods: 
 07-10 Jun, 29-Jun to 01-Jul.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 07-10 Jun, 29-Jun to 01-Jul.

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 07-10 Jun, 29-Jun to 01-Jul.

Southern Australian Regions:
 Disturbed Periods: 04-06 Jun, 13-19 Jun, 24-Jun to 03-Jul.
 Best Quiet Periods: 08-11 Jun, 21-22 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