Weekly Report
(last updated 12 Feb 2026 01:39 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 12 FEBRUARY 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (03 FEBRUARY - 11 FEBRUARY) 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 03 Feb 2111 0121 3 04 Feb 1112 2424 10 In the BOM magnetometer data for 04 Feb, a weak (17nT) impulse was observed at 1505UT. 05 Feb 4443 3122 16 06 Feb 2223 4432 14 07 Feb 3332 2223 11 08 Feb 2211 1122 5 09 Feb 2112 1212 5 10 Feb 1112 1123 5 11 Feb 3233 2332 12 *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 this week. 2. FORECAST (12 FEBRUARY - 14 MARCH) Disturbed Periods: 16-19 Feb. Best Quiet Periods: 13-14 Feb, 27 Feb to 2 Mar, 8 Mar. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: 16 Feb. Best Quiet Periods: 12-14 Feb, 18 Feb to 14 Mar. Central Australian Regions: Disturbed Periods: 16 Feb. Mildly Disturbed Periods: 17-21 Feb, 24-26 Feb, 4-5 Mar. Best Quiet Periods: 12-14 Feb, 28 Feb to 2 Mar, 7-13 Mar. Southern Australian Regions: Disturbed Periods: 16-21 Feb, 24-26 Feb, 4-5 Mar. Best Quiet Periods: 12-14 Feb, 28 Feb to 2 Mar, 7-13 Mar. 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.
