[Ips-wgr] ASWFC Weekly Geo. Report (18 June 26) issued 0403 UT on 18 Jun 2026 [SEC=OFFICIAL]

[Australian Space Weather Forecasting Centre]

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT 
ISSUED ON 18 JUNE 2026
FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE
ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx

1. SUMMARY (09 JUNE - 17 JUNE)
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               
 09 Jun   1112 2232    6  
 10 Jun   1102 3001    3  
 11 Jun   0222 2243    9  
 12 Jun   2333 3122   10  
 13 Jun   2324 3222   11  
 14 Jun   1112 0201    3  
 15 Jun   1110 0001    1  
 16 Jun   2111 1110    3  
 17 Jun   1222 2100    4  

*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 over the entire period
of 09-17 Jun.

2. FORECAST (18 JUNE - 18 JULY)
Disturbed Periods: 
 23-26 Jun, 08-09 Jul.

Best Quiet Periods: 
 18-21 Jun, 27-Jun to 06-Jul, 11-18 Jul.

3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS
Northern Australian Regions:
 No Significantly Disturbed Periods Expected

Central Australian Regions:
 Mildly Disturbed Periods: 09-11 Jul.
 Best Quiet Periods: 19-23 Jun, 28-Jun to 07-Jul, 12-18 Jul.

Southern Australian Regions:
 Disturbed Periods: 09-11 Jul.
 Best Quiet Periods: 19-23 Jul, 29-Jun to 07-Jul, 13-18 Jul.


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