[Ips-wgr] ASWFC Weekly Geo. Report (09 July 26) issued 0204 UT on 09 Jul 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 09 JULY 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (30 JUNE - 08 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               
 30 Jun   0104 3332   10  In the BOM magnetometer data for 30 
                          Jun, a weak (15nT) impulse was observed 
                          at 1151UT.
 01 Jul   4421 3221   12  In the BOM magnetometer data for 01 
                          Jul, a weak (11nT) impulse was observed 
                          at 1441UT.
 02 Jul   1111 0000    1  
 03 Jul   1000 2223    4  In the BOM magnetometer data for 03 
                          Jul, a weak (8nT) impulse was observed 
                          at 1200UT.
 04 Jul   4555 5543   38  
 05 Jul   3333 3222   12  
 06 Jul   1110 1120    2  
 07 Jul   0100 0011    1  
 08 Jul   1232 2231    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.


G1 on 4-Jul. G0 on all other days. 

2. FORECAST (09 JULY - 08 AUGUST)
Disturbed Periods: 
9-10 Jul, 21-23, Jul.

Best Quiet Periods: 
 12-20 Jul, 25-Jul, 29-Jul to 3-Aug.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 Disturbed Periods: None.
 Best Quiet Periods: 12-20 Jul, 25-Jul to 3-Aug

Central Australian Regions:
 Disturbed Periods: None.
 Mildly Disturbed Periods: 9-10 Jul, 21-23 Jul.
 Best Quiet Periods: 12-20 Jul, 25-Jul to 3-Aug

Southern Australian Regions:
 Disturbed Periods: 9-10 Jul, 21-23 Aug
 Best Quiet Periods: 12-20 Jul, 29-Ju; to 3-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