[Ips-wgr] ASWFC Weekly Geo. Report (30 July 26) issued 0434 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  In the BOM magnetometer data for 21 
                          Jul, a weak (9nT) impulse was observed 
                          at 1102UT.
 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.


G0 conditions were reported in the Australian region throughout the 
entire week. Local G1 conditions were observed at Learmonth on 
23-Jul, and at the planetary level on 23-Jul. G0 planetary conditions
were observed on all other days this week.

2. FORECAST (30 JULY - 29 AUGUST)
Disturbed Periods: 
04-06 Aug,  17-19 Aug.

Best Quiet Periods: 
30-31 Jul,  1-3 Aug, 07-16 Aug, 21-29 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.
 Mildly Disturbed Periods: 06-08 Aug, 19-21 Aug.
 Best Quiet Periods: 30-Jul to 03-Aug, 10-16 Aug, 22-25 Aug.

Southern Australian Regions:
 Disturbed Periods: 06-08 Aug, 19-21 Aug.
 Best Quiet Periods: 30-Jul to 03-Aug, 10-16 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