Weekly Report

(last updated 22 Jan 2026 02:47 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 22 JANUARY 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (13 JANUARY - 21 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 13 Jan 2223 1011 5 14 Jan 0102 2123 5 15 Jan 2332 2322 10 16 Jan 3332 3433 15 17 Jan 3342 3333 15 In the BOM magnetometer data for 17 Jan, a weak (14nT) impulse was observed at 0610UT. 18 Jan 2322 2332 10 19 Jan 2112 1388 84 In the BOM magnetometer data for 19 Jan, a weak (12nT) impulse was observed at 1914UT. 20 Jan 7468 7766 115 21 Jan 5456 4423 34 *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 19-20 Jan due to a Coronal Mass Ejection impact with Earth. G2 conditions were observed on 21-Jan. G0 were observed on other days. G0 conditions are expected through the week 22-29 Jan. 2. FORECAST (22 JANUARY - 21 FEBRUARY) Disturbed Periods: 22-23 Jan, 04-07 Feb, 13-17 Feb. Best Quiet Periods: 25-Jan to 02-Feb, 9-10 Feb. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Mildly Disturbed Periods: 15-16 Feb. Best Quiet Periods: 22-Jan to 14-Feb, 17-Feb. Central Australian Regions: Disturbed Periods: 15-16 Feb. Mildly Disturbed Periods: 23-24 Jan, 29-30 Jan, 07-14 Feb, 17-18 Feb Best Quiet Periods: 25-28 Jan, 01-Feb to 06-Feb. Southern Australian Regions: Disturbed Periods: 22-24 Jan, 29-30 Jan, 07-18 Feb. Best Quiet Periods: 25-28 Jan, 01-Feb to 06-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.