Weekly Report
(last updated 22 Oct 2026 02:51 UT)
SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 22 OCTOBER 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (13 OCTOBER - 21 OCTOBER) 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 Oct 3223 2221 8 In the BOM magnetometer data for 13 Oct, a weak (13nT) impulse was observed at 0105UT. 14 Oct 2222 2222 7 15 Oct 2113 3222 8 16 Oct 2111 2342 9 17 Oct 2111 1331 6 18 Oct 2211 1210 4 19 Oct 1100 0101 1 20 Oct 1112 2322 6 21 Oct 2222 2333 10 *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 conditions were observed in the Australian region over 14-21 Oct. Local G1 conditions were reported at Learmonth and Gingin on 16-Oct. 2. FORECAST (22 OCTOBER - 21 NOVEMBER) Disturbed Periods: 22-Oct, 31-Oct to 02-Nov, 07-09 Nov. Best Quiet Periods: 27-29 Oct, 3-6 Nov, 8-Nov, 13-16 Nov, 20-21 Nov. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 23-30 Oct, 02-06 Nov, 11-18 Nov. Central Australian Regions: Mildly Disturbed Periods: 31-Oct to 01-Nov, 07-10 Nov. Best Quiet Periods: 23-30 Oct, 02-06 Nov, 11-18 Nov Southern Australian Regions: Disturbed Periods: 31-Oct to 01-Nov, 07-10 Nov. Best Quiet Periods: 23-30 Oct, 02-06 Nov, 11-18 Nov. 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.
