[Ips-wgr] ASWFC Weekly Geo. Report (30 July 26) issued 0430 UT on 30 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 30 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (21 JULY - 29 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               
 21 Jul   1224 2322   10  
 22 Jul   1323 3112    8  
 23 Jul   2223 2433   12  
 24 Jul   3210 0001    3  
 25 Jul   1111 1220    3  
 26 Jul   1212 0001    2  
 27 Jul   1111 0112    3  
 28 Jul   1122 1221    5  
 29 Jul   1211 0000    2  

*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 (30 JULY - 29 AUGUST)
Disturbed Periods: 
5 Aug,  19 Aug.

Best Quiet Periods: 
 30 Jul,  1-3 Aug,  7 Aug,  10 Aug,  12-16 Aug,  21-23 Aug,  25 Aug.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 30 Jul to 25 Aug.

Central Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 30 Jul to 25 Aug.

Southern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 30 Jul,  1-5 Aug,  7-18 Aug,  22-25 Aug.


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