Weekly Report
(last updated 08 Oct 2026 01:10 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 08 OCTOBER 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (29 SEPTEMBER - 07 OCTOBER) 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 29 Sep 1100 0001 1 30 Sep 1101 1000 1 01 Oct 1110 0112 2 02 Oct 1100 0002 1 03 Oct 2222 1101 4 04 Oct 3345 3343 22 05 Oct 3423 3223 13 In the BOM magnetometer data for 05 Oct, a weak (11nT) impulse was observed at 1356UT. 06 Oct 2233 3211 9 07 Oct 0110 1221 3 *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 in the Australian region on 4-Oct. G0 on all other days. 2. FORECAST (08 OCTOBER - 07 NOVEMBER) Disturbed Periods: 9-11 Oct, 21-22 Oct, 31-Oct to 1-Nov Best Quiet Periods: 13-19 Oct, 25-30 Oct, 4-5 Nov. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed periods: None. Best quiet periods: 13-19 Oct, 25-30 Oct, 4-5 Nov. Central Australian Regions: Disturbed periods: None. Mildly disturbed periods: 9-11 Oct, 21-22 Oct, 31-Oct to 1-Nov. Best quiet periods: 13-19 Oct, 25-30 Oct, 4-5 Nov. Southern Australian Regions: Disturbed periods: 9-11 Oct, 21-22 Oct, 31-Oct to 1-Nov. Best quiet periods: 13-19 Oct, 25-30 Oct, 4-5 Nov. 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.
