Weekly Report

(last updated 25 Jun 2026 02:29 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 25 JUNE 2026 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (16 JUNE - 24 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 16 Jun 2111 1110 3 17 Jun 1222 2100 4 18 Jun 2110 0112 3 19 Jun 1212 0001 2 20 Jun 1111 2011 3 21 Jun 1110 0010 1 22 Jun 0101 1012 2 23 Jun 0001 2120 2 24 Jun 2122 3433 12 *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. Quiet to unsettled conditions. 2. FORECAST (25 JUNE - 25 JULY) Disturbed Periods: 26-28 Jun, 2-3 Jul, 8-9 Jul, 23-24 Jul. Best Quiet Periods: 29-Jun to 1-Jul, 12-20 Jul 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 29-Jun to 1-Jul, 12-20 Jul Central Australian Regions: Disturbed Periods: None. Mildly Disturbed Periods: 25-27 Jun, 2-4 Jul, 9-10 Jul, 22-24 Jul Best Quiet Periods: 29-Jun to 1-Jul, 12-20 Jul Southern Australian Regions: Disturbed Periods: 25-27 Jun, 2-4 Jul, 9-10 Jul, 22-24 Jul. Best Quiet Periods: 29-Jun to 1-Jul, 12-20 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.