Weekly Report
(last updated 27 Aug 2026 03:35 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 27 AUGUST 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (18 AUGUST - 26 AUGUST) 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 18 Aug 3322 2153 14 19 Aug 2434 2122 12 In the BOM magnetometer data for 19 Aug, a weak (8nT) impulse was observed at 0421UT. 20 Aug 2221 3122 7 21 Aug 2221 1011 4 22 Aug 1110 0000 1 23 Aug 1221 1001 3 24 Aug 1110 0002 2 25 Aug 1121 0100 2 26 Aug 0110 0001 1 *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 geomagnetic conditions was observed on 18-Aug. G0 geomagnetic conditions was observed on all other days. 2. FORECAST (27 AUGUST - 26 SEPTEMBER) Disturbed Periods: 28 Aug, 13-15 Sep. Best Quiet Periods: 27 Aug, 29 Aug to 12 Sep, 17-26 Sep. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 27 Aug to 26 Sep. Central Australian Regions: Disturbed Periods: 28 Aug, 13-17 Sep. Best Quiet Periods: 27 Aug, 30 Aug to 12 Sep, 18-26 Sep. Southern Australian Regions: Disturbed Periods: 28-29 Aug, 13-17 Sep. Best Quiet Periods: 27 Aug, 30 Aug to 12 Sep, 18-26 Sep. 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.
