Weekly Report

(last updated 11 Jun 2026 02:24 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 11 JUNE 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (02 JUNE - 10 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 02 Jun 1111 1021 3 03 Jun 2212 1122 5 04 Jun 2100 1000 1 05 Jun 1422 5533 21 In the BOM magnetometer data for 05 Jun, a weak (20nT) impulse was observed at 0506UT. 06 Jun 3333 3221 11 07 Jun 2122 1211 5 08 Jun 2223 2211 7 In the BOM magnetometer data for 08 Jun, a weak (10nT) impulse was observed at 1135UT. 09 Jun 1112 2232 6 10 Jun 1102 3001 3 *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 5 Jun. G0 on all other days. 2. FORECAST (11 JUNE - 11 JULY) Disturbed Periods: 12-14 Jun. Best Quiet Periods: 17-20 Jun, 29-30 Jun, 1-Jul 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 17-Jun to 1-Jul. Central Australian Regions: Disturbed Periods: None. Mildly Disturbed Periods: 12-14 Jul. Best Quiet Periods: 17-Jun 1-Jul. Southern Australian Regions: Disturbed Periods: 12-14 Jul, 2-4 Jul. Best Quiet Periods: 17-Jun to 1-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.