Weekly Report
(last updated 16 Oct 2025 02:09 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 16 OCTOBER 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (07 OCTOBER - 15 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 07 Oct 2223 3322 10 08 Oct 2222 4211 8 In the BOM magnetometer data for 08 Oct, a weak (9nT) impulse was observed at 1203UT. 09 Oct 1121 1012 3 In the BOM magnetometer data for 09 Oct, a weak (9nT) impulse was observed at 0831UT. 10 Oct 2122 1012 4 11 Oct 2332 3323 12 12 Oct 3333 3433 16 13 Oct 4423 3322 15 14 Oct 2121 1212 5 15 Oct 2332 2002 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. G0 geomagnetic conditions were observed in the Australian region over the week. 2. FORECAST (16 OCTOBER - 15 NOVEMBER) Disturbed Periods: 26-31 Oct, 7-10 Nov. Best Quiet Periods: 18-25 Oct, 1-6 Nov, 11-15 Nov. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 28-30 Oct, 8 Nov. Best Quiet Periods: 16-26 Oct, 01-06 Nov, 10-15 Nov. Central Australian Regions: Disturbed: 28-30 Oct, 8 Nov. Mildly Disturbed Periods: 20-21 Oct, 31 Oct, 9-11 Nov. Best Quiet Periods: 16-18 Oct, 23-26 Oct, 2-6 Nov, 13-15 Nov. Southern Australian Regions: Disturbed Periods: 20-21 Oct, 28-31 Oct, 8-11 Nov. Best Quiet Periods: 16-18 Oct, 23-26 Oct, 2-6 Nov, 13-15 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.
