Weekly Report
(last updated 19 Feb 2026 01:09 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 19 FEBRUARY 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (10 FEBRUARY - 18 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 10 Feb 1112 1123 5 11 Feb 3233 2332 12 12 Feb 2222 1212 6 13 Feb 3222 1323 9 14 Feb 2100 0134 6 15 Feb 3422 2322 11 16 Feb 3232 2342 12 17 Feb 2223 3212 8 18 Feb 2212 2221 6 *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 activity was observed in the Australian region throughout the period of 10-18 Feb. Planetary conditions were at the G1 level on 15-Feb and at the G2 level on 16-Feb. 2. FORECAST (19 FEBRUARY - 21 MARCH) Disturbed Periods: 22-25 Feb, 12 Mar, 14-17 Mar and 21-Mar. Best Quiet Periods: 27-Feb to 09-Mar, 19-20 Mar. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: NA Central Australian Regions: NA Mildly Disturbed Periods: 22-25 Feb, 14-17 Mar and 21-Mar. Best Quiet Periods: 27-Feb to 12-Mar, 19-20 Mar. Southern Australian Regions: Disturbed Periods: 22-26 Feb, 12 Mar, 14-17 Mar and 21-Mar. Best Quiet Periods: 19-20 Feb, 22-23 Feb, 26 Feb to 14 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.
