[Ips-wgr] ASWFC Weekly Geo. Report (16 July 26) issued 0402 UT on 16 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 16 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (07 JULY - 15 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               
 07 Jul   0100 0011    1  
 08 Jul   1232 2231    8  
 09 Jul   2124 1333   11  
 10 Jul   1333 3112    9  
 11 Jul   1121 1221    4  
 12 Jul   3234 4331   15  In the BOM magnetometer data for 12 
                          Jul, a weak (11nT) impulse was observed 
                          at 1402UT.
 13 Jul   1111 2222    5  
 14 Jul   2211 0112    4  
 15 Jul   2333 3111    9  

*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 in the Australian region over 
the entire period 09-15 Jul. G1 planetary geomagnetic conditions were 
observed on 12-Jul due to a glancing coronal mass ejection impact. G0 
planetary geomagnetic conditions were observed on other days.

2. FORECAST (16 JULY - 15 AUGUST)
Disturbed Periods: 
21-23 Jul, 04-06 Aug.

Best Quiet Periods: 
17-20 Jul,  24-26 Jul, 29-Jul to 03-Aug, 7-11 Aug.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 16-Jul to 11-Aug.

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 21-24 Jul, 26-27 Jul, 30-31 Jul, 06-08 Aug
 Best Quiet Periods: 16-20 Jul, 28-29 Jul, 01-04 Aug, 09-11 Aug.

Southern Australian Regions:
 Disturbed Periods: 21-24 Jul, 26-27 Jul, 30-31 Jul, 06-08 Aug
 Best Quiet Periods: 16-20 Jul, 28-29 Jul, 01-04 Aug, 09-11 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