Weekly Report

(last updated 12 Jun 2025 01:48 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 12 JUNE 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (03 JUNE - 11 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 03 Jun 4556 5322 35 04 Jun 1333 4432 15 05 Jun 2222 2222 7 06 Jun 1132 1121 5 07 Jun 1233 2144 13 08 Jun 2211 2334 10 09 Jun 2321 2312 8 10 Jun 1121 1222 5 11 Jun 2210 1343 9 *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. Planetary G3 geomagnetic storm on 3-Jun, G1 on 4, 7 and 11 Jun. Australian region reached G2 on 3-Jun, then G0 on other days. 2. FORECAST (12 JUNE - 12 JULY) Disturbed Periods: 14-15 Jun, 25-26 Jun, 4-Jul, 9-Jul. Best Quiet Periods: 16-24 Jun, 28-Jun to 2-Jul, 5-7 Jul 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 16-24 Jun, 28-Jun to 2-Jul, 5-7 Jul Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 16-24 Jun, 28-Jun to 2-Jul, 5-7 Jul Southern Australian Regions: Disturbed Periods: 14-15 Jun, 25-26 Jun, 4-Jul, 9-Jul. Best Quiet Periods: 16-24 Jun, 28-Jun to 2-Jul, 5-7 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.