Weekly Report
(last updated 29 Jan 2026 02:07 UT)
S-UBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 29 JANUARY 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (20 JANUARY - 28 JANUARY) 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 20 Jan 7468 7766 115 21 Jan 5456 4423 34 22 Jan 3223 2224 11 23 Jan 3325 3432 18 24 Jan 3222 2232 9 25 Jan 2222 3322 9 26 Jan 1123 3332 10 27 Jan 2212 1232 7 28 Jan 2223 4434 16 *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. G4 geomagnetic conditions were observed in the Australian region on 20-Jan due to a Coronal Mass Ejection Impact with Earth. G2 conditions were observed on 21-Jan. G1 conditions were observed on 23 Jan. G0 were observed on other days. 2. FORECAST (29 JANUARY - 28 FEBRUARY) Disturbed Periods: 29-30 Jan, 06-07 Feb, 12-13 Feb, 15-20 Feb, 24-26 Feb. Best Quiet Periods: 31-Jan to 05-Feb, 08-11 Feb, 14-Feb, 21-23 Feb, 27-28 Feb. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 16-Feb. Best Quiet Periods: 29-Jan to 14-Feb, 18-28 Feb. Central Australian Regions: Mildly Disturbed: 29-30 Jan, 07-14 Feb, 16-21 Feb, 24-26 Feb. Best Quiet Periods: 01-06 Feb, 28-Feb. Southern Australian Regions: Disturbed Periods: 29-30 Jan, 07-14 Feb, 16-21 Feb, 24-26 Feb. Best Quiet Periods: 01-06 Feb, 28-Feb. 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.
