Weekly Report
(last updated 13 Aug 2026 02:59 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 13 AUGUST 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (04 AUGUST - 12 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 04 Aug 2222 0001 3 05 Aug 1110 0001 1 06 Aug 1100 0000 0 07 Aug 0010 1000 0 08 Aug 1234 5243 18 09 Aug 2221 1011 4 10 Aug 1112 0000 2 11 Aug 0002 2311 4 In the BOM magnetometer data for 11 Aug, a weak (9nT) impulse was observed at 1128UT. 12 Aug 1212 2121 5 *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 on 8 Aug in the Australian region. G0 on other days. 2. FORECAST (13 AUGUST - 12 SEPTEMBER) Disturbed Periods: 18-20 Aug, 4 Sep. Best Quiet Periods: 13-16 Aug, 21-Aug to 2-Sep 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Mildly Disturbed Periods: None. Best Quiet Periods: 13-16 Aug, 21-28 Aug, 1-2 Sep. Central Australian Regions: Disturbed Periods: None. Mildly Disturbed Periods: 18-20 Aug, 4-Sep Best Quiet Periods: 13-16 Aug, 21-Aug to 2-Sep Southern Australian Regions: Disturbed Periods: 18-20 Aug, 4-Sep. Best Quiet Periods: 13-16 Aug, 21-Aug to 2-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.
