Weekly Report

(last updated 13 Nov 2025 03:23 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 13 NOVEMBER 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (04 NOVEMBER - 12 NOVEMBER) 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 04 Nov 2112 2112 5 05 Nov 2232 1334 12 06 Nov 3453 1333 19 07 Nov 4444 4224 22 In the BOM magnetometer data for 07 Nov, a weak (24nT) impulse was observed at 0516UT, a weak (18nT) impulse was observed at 0835UT, a weak (12nT) impulse was observed at 1133UT and a weak (11nT) impulse was observed at 2349UT. 08 Nov 4343 4312 17 09 Nov 2222 1113 6 10 Nov 2222 3332 10 In the BOM magnetometer data for 10 Nov, a weak (11nT) impulse was observed at 1332UT. 11 Nov 1221 0103 4 In the BOM magnetometer data for 11 Nov, a weak (8nT) impulse was observed at 2253UT. 12 Nov 7757 5454 77 *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 conditions were observed in Australia on 06-Nov, G3 conditions were observed on 12-Nov, G0 otherwise. 2. FORECAST (13 NOVEMBER - 13 DECEMBER) Disturbed Periods: 14 Nov, 26-27 Nov, 4-5 Dec. Best Quiet Periods: 17-24 Nov, 29-30 Nov, 7 Dec. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 17-24 Nov, 29-30 Nov, 7 Dec. Central Australian Regions: Disturbed Periods: 14 Nov, 26 Nov, 03-05 Dec Best Quiet Periods: 17-24 Nov, 29-30 Nov, 7 Dec. Southern Australian Regions: Disturbed Periods: 14 Nov, 26 Nov, 03-05 Dec Best Quiet Periods: 17-18 Nov, 22 Nov, 8-10 Dec. 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.