[Ips-wgr] ASWFC Weekly Geo. Report (03 July 25) issued 0115 UT on 03 Jul 2025 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 03 JULY 2025
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (24 JUNE - 02 JULY)
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               
 24 Jun   0222 2221    5  
 25 Jun   1112 2233    7  
 26 Jun   3332 3333   14  
 27 Jun   3333 3122   11  
 28 Jun   1233 2112    7  
 29 Jun   1122 2222    6  
 30 Jun   2223 1321    8  
 01 Jul   2211 0001    2  
 02 Jul   1222 2221    6  

*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 conditions were observed in the Australian regional geomagnetic 
field during the week. Planetary G1 conditions were observed
26/2100-27/0300UT. The mild increase in activity was due to a 
coronal hole wind stream.

2. FORECAST (03 JULY - 02 AUGUST)
Disturbed Periods: 
4-5 Jul,  8-9 Jul, 22-23 Jul.

Best Quiet Periods: 
 13-20 Jul, 26-28 Jul.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: 24-25 Jul.
 Best Quiet Periods: 3-21 Jul.

Central Australian Regions:
 Disturbed Periods: 23-26 Jul.
 Best Quiet Periods: 5-13 Jul,  20-21 Jul, 28-30 Jul.

Southern Australian Regions:
 Disturbed Periods: 16-18 Jul, 23-26 Jul
 Best Quiet Periods: 5-13 Jul, 20-21 Jul, 28-30 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