Weekly Report

(last updated 05 Jun 2025 01:18 UT)

SUBJ: ASWFC WEEKLY GEOPHYSICAL REPORT ISSUED ON 05 JUNE 2025 FROM THE AUSTRALIAN SPACE WEATHER FORECASTING CENTRE ASWAS SCALE DESCRIPTION: https://bit.ly/3lmaMBx 1. SUMMARY (27 MAY - 04 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 27 May 2212 2233 8 28 May 3323 1332 11 29 May 5354 4544 33 30 May 4343 4433 21 31 May 2222 3223 9 01 Jun 3556 5442 37 In the BOM magnetometer data for 01 Jun, a weak (41nT) impulse was observed at 0543UT. 02 Jun 4446 5454 38 In the BOM magnetometer data for 02 Jun, a weak (12nT) impulse was observed at 0716UT. 03 Jun 4556 5322 35 04 Jun 1333 4432 15 *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. Geomagnetic conditions at the G2 level in the Australian region were observed on 01-03 Jun. G1 level conditions were observed on 29-May. Geomagnetic conditions at the G4 level in the planetary region were observed on 01-Jun. G3 conditions were observed on 29-May and 02-03 Jun. G1 conditions were observed on 30-May and 04-Jun. 2. FORECAST (05 JUNE - 05 JULY) Disturbed Periods: 4-5 Jun, 12-27 Jun and 02-04 Jul Best Quiet Periods: 07-10 Jun, 29-Jun to 01-Jul. 3. FORECAST FOR HIGH RESOLUTION AEROMAGNETIC SURVEYS Northern Australian Regions: Disturbed Periods: None. Best Quiet Periods: 07-10 Jun, 29-Jun to 01-Jul. Central Australian Regions: Disturbed Periods: None. Best Quiet Periods: 07-10 Jun, 29-Jun to 01-Jul. Southern Australian Regions: Disturbed Periods: 04-06 Jun, 13-19 Jun, 24-Jun to 03-Jul. Best Quiet Periods: 08-11 Jun, 21-22 Jun. 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.