Weekly Report

(last updated 10 Sep 2026 03:21 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 10 SEPTEMBER 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (01 SEPTEMBER - 09 SEPTEMBER) 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 01 Sep 1112 2221 5 02 Sep 1111 1012 3 03 Sep 1111 1221 4 04 Sep 1111 0000 1 05 Sep 2222 1001 4 06 Sep 1110 0011 1 07 Sep 1223 3343 13 08 Sep 3235 5332 21 09 Sep 1212 2322 7 *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. Active on 8 Sep. Quiet to unsettled on other days. 2. FORECAST (10 SEPTEMBER - 10 OCTOBER) Disturbed Periods: 14-16 Sep. Best Quiet Periods: 13-Sep, 19-Sep to 03-Oct, 10-Oct 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 10 Sep to 6 Oct. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 10-13 Sep 18-Sep to 10-Oct. Southern Australian Regions: NA Disturbed Periods: 15-17 Sep Best Quiet Periods: 13-Sep, 19-Sep to 03-Oct, 10-Oct 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.