Weekly Report

(last updated 04 Jun 2026 04:20 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 04 JUNE 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (26 MAY - 03 JUNE) 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 26 May 1110 0013 3 27 May 1221 0212 4 28 May 1232 2322 8 29 May 2212 3322 8 30 May 2211 1232 6 31 May 2221 1211 5 01 Jun 1112 2221 5 02 Jun 1111 1021 3 03 Jun 2212 1122 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. G0 geomagnetic conditions were observed in the Australian region this week. 2. FORECAST (04 JUNE - 04 JULY) Disturbed Periods: 4-6 Jun, 11-12 Jun. Best Quiet Periods: 8-10 Jun, 17-20 Jun, 29 Jun, 2-4 Jul. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: 4-6 Jun. Best Quiet Periods: 8-10 Jun, 17-Jun to 4-Jul. Central Australian Regions: Disturbed Periods: 4-6 Jun, 11-14 Jun. Best Quiet Periods: 8-10 Jun, 17-Jun to 4-Jul. Southern Australian Regions: Disturbed Periods: 4-6 Jun, 11-14 Jun. Best Quiet Periods: 8-10 Jun, 17-Jun to 4-Jul. 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.