[Ips-wgr] ASWFC Weekly Geo. Report (23 July 26) issued 0343 UT on 23 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 23 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (14 JULY - 22 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               
 14 Jul   2211 0112    4  
 15 Jul   2333 3111    9  
 16 Jul   1211 2010    3  
 17 Jul   0110 1100    1  
 18 Jul   1100 0000    0  
 19 Jul   0010 0000    0  
 20 Jul   0010 0000    0  
 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  

*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 geomagnetic conditions were observed throughout the entire period
of 14-22 Jul.

2. FORECAST (23 JULY - 22 AUGUST)
Disturbed Periods: 
 23-Jul,  5-6 Aug,  11-Aug,  19-20 Aug.

Best Quiet Periods: 
 26-Jul to 4 Aug,  7-10 Aug,  13-17 Aug,  22 Aug.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 24 Jul to 22 Aug.

Central Australian Regions:
 Disturbed Periods: 23-24 Jul,  5-6 Aug,  19-20 Aug.
 Best Quiet Periods: 26 Jul to 4 Aug,  7-17 Aug,  22-Aug.

Southern Australian Regions:
 Disturbed Periods: 23-24 Jul,  5-6 Aug,  11-Aug,  19-20 Aug.
 Best Quiet Periods: 26 Jul to 4 Aug,  7-10 Aug,  13-17 Aug,  22-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