Weekly Report

(last updated 26 Jun 2025 00:42 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 26 JUNE 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (17 JUNE - 25 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 17 Jun 1211 1222 5 18 Jun 2122 2212 6 19 Jun 2221 1033 7 20 Jun 1232 2220 6 21 Jun 1211 3212 6 22 Jun 3221 1121 6 23 Jun 2212 1111 4 24 Jun 0222 2221 5 25 Jun 1112 2233 7 *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 (26 JUNE - 26 JULY) Disturbed Periods: 26-Jun to 1-Jul, 22-26 Jul Best Quiet Periods: 8-20 Jul 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Mildly disturbed periods: 26-27 Jun Best Quiet Periods: 2-20 Jul Central Australian Regions: Disturbed Periods: None. Mildly Disturbed Periods: 26-Jun to 1-Jul, 22-26 Jul Best Quiet Periods: 4-20 Jul Southern Australian Regions: Disturbed Periods: 26-Jun to 1-Jul Mildly disturbed periods: 14-15 Jul, 21-Jul, 22-26 Jul Best Quiet Periods: 4-13 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.